Clean up initialization of com_regs structure, in preparation for
some additional changers.

branches: 1.13.52;
#include <sys/bus.h> instead of <machine/bus.h>.

Remove clause 3 and 4 from TNF licenses

branches: 1.11.2; 1.11.4;
Split device_t and softc for all com(4) devices (well, everything that
uses a com_softc backend). Use proper types and ansify where appropriate.

branches: 1.10.34; 1.10.54; 1.10.58;
Add an option COM_REGMAP to allow com(4) to use an array of register indices.
This allows us to convert aucom to just another com attachment, and cleanup
some code in the com_arbus.c.

Additionally, we use a common com_cleanup routine rather than having a
zillion copies of it in the attachment points.

This has been tested on a number architectures, and it has been shown to get
close to comparable performance when COM_REGMAP is defined, and comparable
when it is not defined.

Approved by core@. Fixes PR port-evbmips/32362.

branches: 1.9.4; 1.9.8; 1.9.16;
merge ktrace-lwp.

branches: 1.8.16;
__KERNEL_RCSID()

branches: 1.7.2;
Use aprint*().

Use indirect configuration for on-board devices (i.e. those things
attached to "obio") on the IQ80310 and IQ80321. It makes more sense
to do it this way for this type of system (the goal being to encapsulate
as much information about the board as possible into one file).

Use CFATTACH_DECL().

Declare all cfattach structures const.

Rather than referencing the cfdriver directly in the cfdata entries,
instead use a string naming the driver. The cfdriver is then looked
up in a list which is built at run-time.

branches: 1.2.6; 1.2.8;
Set COM_HW_NO_TXPRELOAD. The IQ80321's UART doesn't lose without
this, but it works fine with it, and this serves to broaden the
testing field of the flag.

Support for the Intel IQ80321 eval board for the i80321 I/O Processor.