net/sched: Add match-all classifier hw offloading.

Following the work that have been done on offloading classifiers like u32
and flower, now the match-all classifier hw offloading is possible. if
the interface supports tc offloading.

To control the offloading, two tc flags have been introduced: skip_sw and
skip_hw. Typical usage:

tc filter add dev eth25 parent ffff: 	\
	matchall skip_sw		\
	action mirred egress mirror	\
	dev eth27

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 43c749b..076df536 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -787,6 +787,7 @@
 	TC_SETUP_MQPRIO,
 	TC_SETUP_CLSU32,
 	TC_SETUP_CLSFLOWER,
+	TC_SETUP_MATCHALL,
 };
 
 struct tc_cls_u32_offload;
@@ -797,6 +798,7 @@
 		u8 tc;
 		struct tc_cls_u32_offload *cls_u32;
 		struct tc_cls_flower_offload *cls_flower;
+		struct tc_cls_matchall_offload *cls_mall;
 	};
 };