with acpi but the timer runs twice as fast. Note that the main problem
(system doesn't work properly with acpi disabled) should be fixed separately.
Changes:
* Add a quirk to disable the timer
* Merge the P5A and P5A-B quirks since they appear to be based on the
same ASL.
PR: i386/72450
Tested by: Kevin Oberman <oberman es.net>
MFC after: 3 days