EPERM from VOP_ACCESS() is always an error, so don't hide it.
EPERM from VOP_ACCESS() is always an error, so don't hide it.

Diff from FreeBSD.

OK blambert@

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