Use acpi_compatible_match().

Merge jmcneill-audiomp3 branch, which is derived from ad-audiomp2. From
the original ad-audiomp branch notes:

Add MP locking to the audio drivers.

Making the audio drivers MP safe is necessary before efforts
can be made to make the VM system MP safe.

The are two locks per device instance, an ISR lock and
a character device lock. The ISR lock replaces calls to
splaudio()/splx(), and will be held across calls to device
methods which were called at splaudio() before (e.g.
trigger_output). The character device lock is held across
calls to nearly all of the methods, excluding some only
used for initialization, e.g. get_locks.

Welcome to 5.99.57.

branches: 1.10.10; 1.10.12;
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: 1.9.2;
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: 1.8.4; 1.8.12; 1.8.14; 1.8.16; 1.8.18; 1.8.22;
Split device_t/softc for joy(4) and all its attachments. Also
use device_lookup_private() and related cosmetic changes.

Reviewed by cube@.

branches: 1.7.16;
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: 1.1.4; 1.1.14;
Add ACPI joy(4) attachment, based on lpt_acpi.c by jmcneill@,
reviewed and ok'ed by cube@ and martin@.