Fix locking logic, remembering that hppa locks are inverted. Whilst here also add mpl_cpu and curcpu() to the debugging messages.
Fix locking logic, remembering that hppa locks are inverted. Whilst here
also add mpl_cpu and curcpu() to the debugging messages.

Issue spotted by and ok kettenis@

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