net_sched: Add qdisc_enqueue wrapper

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index 536ca47..d29c2f8 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -81,7 +81,8 @@
 	}
 #endif
 
-	if ((ret = qdisc->enqueue(skb, qdisc)) == NET_XMIT_SUCCESS) {
+	ret = qdisc_enqueue(skb, qdisc);
+	if (ret == NET_XMIT_SUCCESS) {
 		sch->bstats.bytes += skb->len;
 		sch->bstats.packets++;
 		sch->q.qlen++;