PM: hibernate: Remove blk_status_to_errno in hib_wait_io

blk_status_to_errno doesn't appear to perform extra work besides
converting blk_status_t to integer. This patch removes that unnecessary
conversion as the return type of the function is blk_status_t.
Signed-off-by: Falla Coulibaly <fallacoulibalyz@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/power/swap.c

@@ -306,7 +306,7 @@ static blk_status_t hib_wait_io(struct hib_bio_batch *hb)
 	 * a plug will flush the plug list before sleeping.
 	 */
 	wait_event(hb->wait, atomic_read(&hb->count) == 0);
-	return blk_status_to_errno(hb->error);
+	return hb->error;
 }
 
 /*