scsi: smartpqi: Fix an error code in pqi_get_raid_map()

Return -EINVAL on failure instead of success.

Link: https://lore.kernel.org/r/20210810084613.GB23810@kili


Fixes: a91aaae0 ("scsi: smartpqi: allow for larger raid maps")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>