can use the same bus_space_read_region_4() to copy both type1 and type4 prom; tested on type4 by me and miod on type1
can use the same bus_space_read_region_4() to copy both type1 and type4 prom; tested on type4 by me and miod on type1

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