net/mlx5e: Enable TC offload for egress MACVLAN

Support offloading of TC rules that mirror/redirect egress traffic to a
MACVLAN device, which is attached to mlx5 representor net device.

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>