Add mmap for upa(4).  Makes the X wsfb(4) driver actually work instead of crashing the machine on UltraSPARC-III machines with creator(4) framebuffers.
Add mmap for upa(4).  Makes the X wsfb(4) driver actually work instead of
crashing the machine on UltraSPARC-III machines with creator(4) framebuffers.

ok jason@, tsi@

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