octeontx2-pf: Adds TC offload support

Implements tc offload support for rvu representors.

Usage example:

 - Add tc rule to drop packets with vlan id 3 using port
   representor(Rpf1vf0).

	# tc filter add dev Rpf1vf0 protocol 802.1Q parent ffff: flower
	   vlan_id 3 vlan_ethtype ipv4 skip_sw action drop

- Redirect packets with vlan id 5 and IPv4 packets to eth1,
  after stripping vlan header.

	# tc filter add dev Rpf1vf0 ingress protocol 802.1Q flower vlan_id 5
	  vlan_ethtype ipv4 skip_sw action vlan pop action mirred ingress
	  redirect dev eth1

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>