Further research shows that fp@x,y device path components with x > 0 are used by Solaris for virtual ports (NPIV), and booting from thos is not supported by OBP.  Simplify the code accordingly.
Further research shows that fp@x,y device path components with x > 0 are
used by Solaris for virtual ports (NPIV), and booting from thos is not
supported by OBP.  Simplify the code accordingly.

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