i am a stupid head. unbreak kernels that done have the bio(4) device.
i am a stupid head. unbreak kernels that done have the bio(4) device.

reported and fixed by Michael Knudsen.

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