scsi: ufs: Simplify ufshcd_clear_cmd()

Remove the local variable 'err'. This patch does not change any
functionality.

Link: https://lore.kernel.org/r/20220613214442.212466-2-bvanassche@acm.orgReviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/core/ufshcd.c

@@ -2866,7 +2866,6 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
 static int
 ufshcd_clear_cmd(struct ufs_hba *hba, int tag)
 {
-	int err = 0;
 	unsigned long flags;
 	u32 mask = 1 << tag;
 
@@ -2879,11 +2878,8 @@ ufshcd_clear_cmd(struct ufs_hba *hba, int tag)
 	 * wait for h/w to clear corresponding bit in door-bell.
 	 * max. wait is 1 sec.
 	 */
-	err = ufshcd_wait_for_register(hba,
-			REG_UTP_TRANSFER_REQ_DOOR_BELL,
-			mask, ~mask, 1000, 1000);
-
-	return err;
+	return ufshcd_wait_for_register(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL,
+					mask, ~mask, 1000, 1000);
 }
 
 static int