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_atm.c b/net/sched/sch_atm.c
index 0de757e..68ed35e 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -429,7 +429,7 @@
 #endif
 	}
 
-	ret = flow->q->enqueue(skb, flow->q);
+	ret = qdisc_enqueue(skb, flow->q);
 	if (ret != 0) {
 drop: __maybe_unused
 		sch->qstats.drops++;