Comment 20 for bug 1900800

so the expecation here is that nova will creat the mdevs automatically on host reboot
there is justa bug in our currnt code.
you as an operator should not have to use mdevctl or any other host tooling to persist them.

we also dont support the use of mdevctl to precreat the mdevs today
if we want to move to that model we need to signifcatly change how we manage mdevs today.