[NET_SCHED]: Unline tcf_destroy

Uninline tcf_destroy and add a helper function to destroy an entire filter
chain.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
index f63d5c6..1fb60ab 100644
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -346,14 +346,9 @@
 static void ingress_destroy(struct Qdisc *sch)
 {
 	struct ingress_qdisc_data *p = PRIV(sch);
-	struct tcf_proto *tp;
 
 	DPRINTK("ingress_destroy(sch %p,[qdisc %p])\n", sch, p);
-	while (p->filter_list) {
-		tp = p->filter_list;
-		p->filter_list = tp->next;
-		tcf_destroy(tp);
-	}
+	tcf_destroy_chain(p->filter_list);
 #if 0
 /* for future use */
 	qdisc_destroy(p->q);