nfp: flower: enforce more strict pre_tun checks

Make sure that the rule also matches on source MAC address. On top
of that also now save the src and dst MAC addresses similar to how
vlan_tci is saved - this will be used in later comparisons with
neighbour entries. Indicate if the flow matched on ipv4 or ipv6.
Populate the vlan_tpid field that got added to the pre_run_rule
struct as well.

Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>