scsi: lpfc: Use list_move_tail() instead of list_del()/list_add_tail()

Using list_move_tail() instead of list_del() + list_add_tail().

Link: https://lore.kernel.org/r/1623113493-49384-1-git-send-email-zou_wei@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_sli.c

@@ -20185,8 +20185,7 @@ lpfc_cleanup_pending_mbox(struct lpfc_vport *vport)
 			(mb->u.mb.mbxCommand != MBX_REG_VPI))
 			continue;
 
-		list_del(&mb->list);
+		list_move_tail(&mb->list, &mbox_cmd_list);
-		list_add_tail(&mb->list, &mbox_cmd_list);
 	}
 	/* Clean up active mailbox command with the vport */
 	mb = phba->sli.mbox_active;