Pull up following revision(s) (requested by tsutsui in ticket #407):
sys/arch/macppc/stand/ofwboot/boot.c: revision 1.23
sys/arch/macppc/stand/ofwboot/boot.h: revision 1.3
sys/arch/macppc/stand/ofwboot/ofdev.c: revision 1.22
sys/arch/macppc/stand/ofwboot/ofdev.h: revision 1.6
sys/arch/macppc/stand/ofwboot/version: revision 1.12
- modify a pathname parse function to explicitly return devname and filename
- check floppyboot properly per devname before loadfile(), not in devopen()
- disable LOAD_NOTE on floppyboot to avoid backward seek
- bump revision
Tested floppy boot and IDE boot on Apus2000 with OpenFirmware 2.0.
Fixes PR install/38943 on macppc.

(snj)