sched: replace __skb_dequeue with __qdisc_dequeue_head

After previous patch these functions are identical.
Replace __skb_dequeue in qdiscs with __qdisc_dequeue_head.

Next patch will then make __qdisc_dequeue_head handle
single-linked list instead of strcut sk_buff_head argument.

Doesn't change generated code.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_codel.c b/net/sched/sch_codel.c
index 4002df3..5bfa79e 100644
--- a/net/sched/sch_codel.c
+++ b/net/sched/sch_codel.c
@@ -69,7 +69,7 @@
 static struct sk_buff *dequeue_func(struct codel_vars *vars, void *ctx)
 {
 	struct Qdisc *sch = ctx;
-	struct sk_buff *skb = __skb_dequeue(&sch->q);
+	struct sk_buff *skb = __qdisc_dequeue_head(&sch->q);
 
 	if (skb)
 		sch->qstats.backlog -= qdisc_pkt_len(skb);
@@ -172,7 +172,7 @@
 
 	qlen = sch->q.qlen;
 	while (sch->q.qlen > sch->limit) {
-		struct sk_buff *skb = __skb_dequeue(&sch->q);
+		struct sk_buff *skb = __qdisc_dequeue_head(&sch->q);
 
 		dropped += qdisc_pkt_len(skb);
 		qdisc_qstats_backlog_dec(sch, skb);