net: sched: update action implementations to support flags

Extend struct tc_action with new "tcfa_flags" field. Set the field in
tcf_idr_create() function and provide new helper
tcf_idr_create_from_flags() that derives 'cpustats' boolean from flags
value. Update individual hardware-offloaded actions init() to pass their
"flags" argument to new helper in order to skip percpu stats allocation
when user requested it through flags.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index adf1cbd..d5eff6a 100644
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -191,7 +191,7 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
 			goto out_free;
 		}
 		ret = tcf_idr_create(tn, index, est, a,
-				     &act_pedit_ops, bind, false);
+				     &act_pedit_ops, bind, false, 0);
 		if (ret) {
 			tcf_idr_cleanup(tn, index);
 			goto out_free;