Be sure to return if the pci interrupt can't be mapped, instead of falling through the remainder of the attachment logic.
Be sure to return if the pci interrupt can't be mapped, instead of falling
through the remainder of the attachment logic.

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