Reduce HPET eventtimer priority on systems with 8 or more cores.  Price of
the lock congestion may be too high there (2.5% on 4x4 core AMD Opteron).
Reinitialize eh after pfil(9) processing.

PR:		176764
Submitted by:	adri
Remove LIBALIAS_LOCK_ASSERT(), including a couple with an uninitialzed
argument, in code that isn't compiled in kernel.

PR:		kern/176667
Sponsored by:	Nginx, Inc.