net_sched: long word align struct qdisc_skb_cb data

netem_skb_cb() does :

return (struct netem_skb_cb *)qdisc_skb_cb(skb)->data;

Unfortunatly struct qdisc_skb_cb data is not long word aligned, so
access to psched_time_t time_to_send uses a non aligned access.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 160a407..04f8556 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -199,7 +199,7 @@
 
 struct qdisc_skb_cb {
 	unsigned int		pkt_len;
-	char			data[];
+	long			data[];
 };
 
 static inline int qdisc_qlen(struct Qdisc *q)