Only compile hibernate_machdep if option hibernate is set. Unbreaks i386 kernel build.
Only compile hibernate_machdep if option hibernate is set.
Unbreaks i386 kernel build.

ok mlarkin@

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