net_sched: get rid of struct tcf_common

After the previous patch, struct tc_action should be enough
to represent the generic tc action, tcf_common is not necessary
any more. This patch gets rid of it to make tc action code
more readable.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tc_act/tc_vlan.h b/include/net/tc_act/tc_vlan.h
index 584b807..e29f52e 100644
--- a/include/net/tc_act/tc_vlan.h
+++ b/include/net/tc_act/tc_vlan.h
@@ -16,7 +16,7 @@
 #define VLAN_F_PUSH		0x2
 
 struct tcf_vlan {
-	struct tcf_common	common;
+	struct tc_action	common;
 	int			tcfv_action;
 	u16			tcfv_push_vid;
 	__be16			tcfv_push_proto;