pkt_sched: Make netem queue agnostic.

It just wants the root qdisc given an arbitrary qdisc,
and that is simply qdisc->dev_queue->qdisc
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Acked-by: NStephen Hemminger <shemminger@vyatta.com>

net/sched/sch_netem.c

@@ -180,7 +180,7 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 	 * skb will be queued.
 	 */
 	if (count > 1 && (skb2 = skb_clone(skb, GFP_ATOMIC)) != NULL) {
-		struct Qdisc *rootq = qdisc_dev(sch)->tx_queue.qdisc;
+		struct Qdisc *rootq = sch->dev_queue->qdisc;
 		u32 dupsave = q->duplicate; /* prevent duplicating a dup... */
 		q->duplicate = 0;