AIX servers using VIOS servers that virtualize FC cards will have a
problem booting without support for START_STOP_UNIT.

Cite sbc3r36 exactly, clean up if conditions (rob + hch)
Signed-off-by: NBrian Bunker <brian@purestorage.com>
Signed-off-by: NSpencer Baugh <sbaugh@catern.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: "Robert Elliott (Server Storage)" <Elliott@hp.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>