pkt_sched: Make qdisc->gso_skb a list.

The idea is that we can use this to get rid of
->requeue().

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index e556962..3b983e8 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -52,7 +52,7 @@
 	u32			parent;
 	atomic_t		refcnt;
 	unsigned long		state;
-	struct sk_buff		*gso_skb;
+	struct sk_buff_head	requeue;
 	struct sk_buff_head	q;
 	struct netdev_queue	*dev_queue;
 	struct Qdisc		*next_sched;