scsi: ufs: core: Fix unnecessary operation for early return

Setting bitmap_len is not required when returning early. Defer until it is
needed.

Signed-off-by: ChanWoo Lee <cw9316.lee@samsung.com>
Link: https://lore.kernel.org/r/20221111062301.7423-1-cw9316.lee@samsung.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>