Fixup some more fallout from the lapic/i8254 changes:

• Make sure timer0_max_count is set to a correct value in the lapic case.
• Revert i8254_restore() to explicitly reprogram timer 0 rather than calling set_timer_freq() to do it. set_timer_freq() only reprograms the counter if the max count changes which it never does on resume. This unbreaks suspend/resume for several people.

Tested by: marks, others
Reviewed by: bde
MFC after: 3 days