Detect a stuck PIT in inithz, and assume a fixed cpuhz.
Detect a stuck PIT in inithz, and assume a fixed cpuhz.

Something strange happens in qemu with KVM, where inithz() gets stuck
in an infinite loop.  Guard against infinite loops in inithz, even if
it's just for good measure, since I spent some time chasing down the
same infinite loop several months ago.  Next step is to figure out what
is actually causing this infinite loop.

aclements/sv6,bowlofstew/sv6,bowlofstew/sv6,bowlofstew/sv6,bowlofstew/sv6,aclements/sv6,aclements/sv6,bowlofstew/sv6,aclements/sv6,aclements/sv6