The R8A7740 has a Gigabit Ethernet MAC. This patch supports it.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>