Use malloc(M_WAITOK) in if_attach_common(), because this function must succeed, and it's always called in sleepable context.
Use malloc(M_WAITOK) in if_attach_common(), because this function must
succeed, and it's always called in sleepable context.

OK mikeb@ yasuoka@

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