selftests: forwarding: mirror_gre_bridge_1q_lag: Enable forwarding

This test relies on routing in the primary traffic path, but neglects to
enable forwarding. Do so.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed