When laying out objects in a ZONE_INTERRUPT zone, allow them to cross a page boundary, since we've already allocated all our contiguous kva space up front.  This eliminates some memory wastage, and allows us to actually reach the # of objects were specified in the zinit() call.
When laying out objects in a ZONE_INTERRUPT zone, allow them to cross
a page boundary, since we've already allocated all our contiguous kva
space up front.  This eliminates some memory wastage, and allows us to
actually reach the # of objects were specified in the zinit() call.

Reviewed by: peter, dillon

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