Equiv diff to amd64 as was done on i386, bump VM_PHYSSEG_MAX.  Amd64 are PCs too...
Equiv diff to amd64 as was done on i386, bump VM_PHYSSEG_MAX.  Amd64 are
PCs too...

Tested by dlg@ and brad.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars