scsi: ibmvscsis: Use list_move_tail instead of list_del/list_add_tail

Using list_move_tail() instead of list_del() + list_add_tail().
Signed-off-by: NWei Yongjun <weiyj.lk@gmail.com>
Reviewed-by: NTyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c

@@ -3697,8 +3697,7 @@ static void ibmvscsis_release_cmd(struct se_cmd *se_cmd)
 
 	spin_lock_bh(&vscsi->intr_lock);
 	/* Remove from active_q */
-	list_del(&cmd->list);
-	list_add_tail(&cmd->list, &vscsi->waiting_rsp);
+	list_move_tail(&cmd->list, &vscsi->waiting_rsp);
 	ibmvscsis_send_messages(vscsi);
 	spin_unlock_bh(&vscsi->intr_lock);
 }