ovs-tc: offload MPLS pop actions to TC datapath

ovs-tc: offload MPLS pop actions to TC datapath

TC now supports an action to pop the outer MPLS header from a packet. The
next protocol after the header is required alongside this. Currently, OvS
datapath rules also supply this information.

Offload OvS MPLS pop actions to TC along with the next protocol.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>