scsi: ufs: core: Remove repeated word in comment

Remove repeated word "for" in comment.

Link: https://lore.kernel.org/r/1891546521.01622777101796.JavaMail.epsvc@epcpadp3Signed-off-by: Keoseong Park <keosung.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -2827,7 +2827,7 @@ ufshcd_clear_cmd(struct ufs_hba *hba, int tag)
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
 	/*
-	 * wait for for h/w to clear corresponding bit in door-bell.
+	 * wait for h/w to clear corresponding bit in door-bell.
 	 * max. wait is 1 sec.
 	 */
 	err = ufshcd_wait_for_register(hba,