ieee1394: sbp2: use list_move_tail()

It's OK to reorder list_del() and sbp2util_free_command_dma() here.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/ieee1394/sbp2.c

@@ -619,9 +619,8 @@ static void sbp2util_mark_command_completed(
 		struct sbp2_lu *lu,
 		struct sbp2_command_info *cmd)
 {
-	list_del(&cmd->list);
 	sbp2util_free_command_dma(cmd);
-	list_add_tail(&cmd->list, &lu->cmd_orb_completed);
+	list_move_tail(&cmd->list, &lu->cmd_orb_completed);
 }
 
 /*