net: sched: extract qstats update code into functions

Extract common code that increments cpu_qstats counters into standalone act
API functions. Change hardware offloaded actions that use percpu counter
allocation to use the new functions instead of accessing cpu_qstats
directly.

This commit doesn't change functionality.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index f6dccaa..ffa0f43 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -88,7 +88,7 @@ static int tcf_vlan_act(struct sk_buff *skb, const struct tc_action *a,
 	return action;
 
 drop:
-	qstats_drop_inc(this_cpu_ptr(v->common.cpu_qstats));
+	tcf_action_inc_drop_qstats(&v->common);
 	return TC_ACT_SHOT;
 }