according to miod pmap_update() is not need after pmap_extract() at all, so remove it.
according to miod pmap_update() is not need after pmap_extract() at all,
so remove it.

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