[SCSI] hpsa: do not consider RAID level to be part of device identity

Otherwise, after doing a RAID level migration, the disk will be
disruptively removed and re-added as a different disk on rescan.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/hpsa.c

@@ -657,8 +657,6 @@ static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
 		return 0;
 	if (dev1->devtype != dev2->devtype)
 		return 0;
-	if (dev1->raid_level != dev2->raid_level)
-		return 0;
 	if (dev1->bus != dev2->bus)
 		return 0;
 	return 1;