shove a minphys request against mpath down all to the minphys on each path so we can guarantee that any of the paths we push the io down later will work.
shove a minphys request against mpath down all to the minphys on each path
so we can guarantee that any of the paths we push the io down later will
work.

with help from a discussion from beck and krw

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