Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.27.14;
use pci_intr_establish_xname() everywhere

branches: 1.26.14; 1.26.16;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.25.6; 1.25.10;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

branches: 1.24.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.23.12; 1.23.22;
Cleanup interrupt establish error messages. Do not mix
aprint_error/aprint_normal/printf calls for a single line.

use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.19.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.18.2; 1.18.4;
use aprint_*_dev and device_xname

branches: 1.17.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.16.8; 1.16.22; 1.16.24; 1.16.28;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.14.2; 1.14.4;
static goes first

branches: 1.13.4; 1.13.8;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

branches: 1.11.6; 1.11.14; 1.11.16;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Nuke incorrect mailbox length defines and just use 13 everywhere. May help
with PR/14266.

Handle aincent firmware as found on EISA/MCA boards. Untested.

branches: 1.6.8; 1.6.10;
add RCSID

branches: 1.5.6;
Map both memory and IO space, but prefer using memory space.

Don't map I/O space if we have already have a good memory mapping.

branches: 1.3.2;
Correct arguments to bus_dmamap_create(), and add a reset routine for the v3
interface.

branches: 1.2.2;
Make it compile (for alpha). The porting author might want to look
at this more closely than I have.

branches: 1.1.2;
Add a driver for the Mylex DAC960 family (including DEC SWXCR).

use pci_intr_establish_xname() everywhere

branches: 1.26.14;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.25.6; 1.25.10;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

branches: 1.24.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.23.12; 1.23.22;
Cleanup interrupt establish error messages. Do not mix
aprint_error/aprint_normal/printf calls for a single line.

use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.19.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.18.2; 1.18.4;
use aprint_*_dev and device_xname

branches: 1.17.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.16.8; 1.16.22; 1.16.24; 1.16.28;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.14.2; 1.14.4;
static goes first

branches: 1.13.4; 1.13.8;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

branches: 1.11.6; 1.11.14; 1.11.16;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Nuke incorrect mailbox length defines and just use 13 everywhere. May help
with PR/14266.

Handle aincent firmware as found on EISA/MCA boards. Untested.

branches: 1.6.8; 1.6.10;
add RCSID

branches: 1.5.6;
Map both memory and IO space, but prefer using memory space.

Don't map I/O space if we have already have a good memory mapping.

branches: 1.3.2;
Correct arguments to bus_dmamap_create(), and add a reset routine for the v3
interface.

branches: 1.2.2;
Make it compile (for alpha). The porting author might want to look
at this more closely than I have.

branches: 1.1.2;
Add a driver for the Mylex DAC960 family (including DEC SWXCR).

Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.25.6; 1.25.10;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

branches: 1.24.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.23.12; 1.23.22;
Cleanup interrupt establish error messages. Do not mix
aprint_error/aprint_normal/printf calls for a single line.

use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.19.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.18.2; 1.18.4;
use aprint_*_dev and device_xname

branches: 1.17.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.16.8; 1.16.22; 1.16.24; 1.16.28;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.14.2; 1.14.4;
static goes first

branches: 1.13.4; 1.13.8;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

branches: 1.11.6; 1.11.14; 1.11.16;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Nuke incorrect mailbox length defines and just use 13 everywhere. May help
with PR/14266.

Handle aincent firmware as found on EISA/MCA boards. Untested.

branches: 1.6.8; 1.6.10;
add RCSID

branches: 1.5.6;
Map both memory and IO space, but prefer using memory space.

Don't map I/O space if we have already have a good memory mapping.

branches: 1.3.2;
Correct arguments to bus_dmamap_create(), and add a reset routine for the v3
interface.

branches: 1.2.2;
Make it compile (for alpha). The porting author might want to look
at this more closely than I have.

branches: 1.1.2;
Add a driver for the Mylex DAC960 family (including DEC SWXCR).