- Use napi_gro_receive() and vlan_gro_receive()
- Enable GRO by default

Tested on a RTL8111/8168 adapter
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NFrancois Romieu <romieu@fr.zoreil.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>