Fix pmap_kenter_pa4m. First shot at a better pmap_kenter_pgs.
Fix pmap_kenter_pa4m. First shot at a better pmap_kenter_pgs.

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