Removed #include of <machine/clock.h>.  It is no longer used, and would break when I remove LOCORE support from clock.h. I586_CTR_MULTIPLIER_SHIFT = 32 from clock.h is actually still used, but 32 is so magic that it doesn't get used explicitly.
Removed #include of <machine/clock.h>.  It is no longer used, and would
break when I remove LOCORE support from clock.h.
I586_CTR_MULTIPLIER_SHIFT = 32 from clock.h is actually still used, but
32 is so magic that it doesn't get used explicitly.

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