Use direct mappings in XKPHYS for bus_space, instead of extent and TLB backed pages.
Use direct mappings in XKPHYS for bus_space, instead of extent and TLB
backed pages.

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