net/mlx5e: Return success when TC offloaded fdb actions parsed ok

Reaching here, means we didn't err anywhere, so lets just
return success.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>