ALSA: emu10k1: 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: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/memory.c

@@ -263,8 +263,8 @@ int snd_emu10k1_memblk_map(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *b
 	spin_lock_irqsave(&emu->memblk_lock, flags);
 	if (blk->mapped_page >= 0) {
 		/* update order link */
-		list_del(&blk->mapped_order_link);
-		list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head);
+		list_move_tail(&blk->mapped_order_link,
+			       &emu->mapped_order_link_head);
 		spin_unlock_irqrestore(&emu->memblk_lock, flags);
 		return 0;
 	}