tc/flower: Add match on encapsulating tos/ttl

tc/flower: Add match on encapsulating tos/ttl

Add matching on tos/ttl of the IP tunnel headers.

For example, here's decap rule that matches on the tunnel tos:

tc filter add dev vxlan_sys_4789 protocol ip parent ffff: prio 10 flower \
   enc_src_ip 192.168.10.2 enc_dst_ip 192.168.10.1 enc_key_id 100 enc_dst_port 4789 enc_tos 0x30 \
   src_mac e4:11:22:33:44:70 dst_mac e4:11:22:33:44:50  \
   action tunnel_key unset \
   action mirred egress redirect dev eth0_0

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>