Use acpi_compatible_match().

Remove <dev/acpi/acpica.h> from all files. It is included from
<dev/acpi/acpivar.h>. Ditto for <dev/sysmon/sysmonvar.h>, <sys/bus.h>,
<dev/pci/pcivar.h>, and <dev/isa/isavar.h>.

Also nuke a lot of unused and invalid headers. Some of these are audibly
provided by standard headers (namely <sys/param.h> and <sys/device.h>), some
have nothing to do with ACPI devices (e.g. <sys/syslog.h>), and some are
nonexistent local includes (e.g. "mpu_ym.h"). Moreoever, try to group the
includes into their respective blocks.

Tested with GENERIC and ALL (i386). No functional change.

branches: 1.13.2;
During shutdown, detach attimer at acpi.

Cut the amount of spam from acpi devices in roughly half by printing
resources on the same line as autoconf messages. Things like:
pcppi1 at acpi0 (SPKR, PNP0800)
pcppi1: io 0x61
become:
pcppi1 at acpi0 (SPKR, PNP0800): io 0x61

branches: 1.11.8; 1.11.10; 1.11.14; 1.11.18;
Remove clause 3 and 4 from TNF licenses

branches: 1.10.2; 1.10.4;
- Split device_t and softc for pcppi(4) and attimer(4)
- Change the attimer <-> pcppi communication using device_t so that
pcppi(4) doesn't have to know about the contents of struct attimer_softc.

XXX pcppi's childdet function is completely wrong. This has to be
XXX revisited later.

branches: 1.9.2; 1.9.6;
Detach attimer at acpi, attimer at isa.

Use device_t, device_private().

branches: 1.7.2; 1.7.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.6.2;
Use a two clause license for all the code I contributed.

The envsys code will be changed later.

branches: 1.5.8; 1.5.22; 1.5.24; 1.5.26;
__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: 1.3.14; 1.3.16;
use aprint_*

branches: 1.2.2; 1.2.4; 1.2.6;
merge ktrace-lwp.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.8;
Add attimer(4) driver, with ISA and ACPI attachments.

attimer(4) is the new body of the part of pcppi(4) that mapped the TIMER1
register to set the pitch of the bell. It was necessary to separate them
in order to have a working ACPI attachment (as the two appear as different
devices in the ACPI structures).