Tweak comment on struct _partitionv0. It's no longer the partition table.
Tweak comment on struct _partitionv0. It's no longer the partition
table.

Suggested by David Vasek.

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