expand the ifdef _KERNEL around kernel only function prototypes since they have no business being export to userland.
expand the ifdef _KERNEL around kernel only function prototypes
since they have no business being export to userland.

OK blambert@

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