net: qos: add tc police offloading action with max frame size limit

Current police offloading support the 'burst'' and 'rate_bytes_ps'. Some
hardware own the capability to limit the frame size. If the frame size
larger than the setting, the frame would be dropped. For the police
action itself already accept the 'mtu' parameter in tc command. But not
extend to tc flower offloading. So extend 'mtu' to tc flower offloading.

Signed-off-by: Po Liu <Po.Liu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 00c15f1..c2ef19c 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -234,6 +234,7 @@ struct flow_action_entry {
 		struct {				/* FLOW_ACTION_POLICE */
 			s64			burst;
 			u64			rate_bytes_ps;
+			u32			mtu;
 		} police;
 		struct {				/* FLOW_ACTION_CT */
 			int action;