sd, sr: fix Driver 'sd' needs updating message

sd, sr: fix Driver 'sd' needs updating message

If a SCSI ULD driver sets blk_queue_prep_rq(), it should clean it
up itself on remove(), and not from the bus callbacks. This
removes the need to hook into bus->remove(), which should not
be used at the same time as driver->remove().

[jejb: fix sdkp initialisation problem due to mismerge]
Signed-off-by: Hannes Reinecke <[email protected]>
Signed-off-by: Kay Sievers <[email protected]>
Signed-off-by: James Bottomley <[email protected]>