net: mvneta: implement .set_wol and .get_wol

The mvneta itself does not support WOL, but the PHY might.
So pass the calls to the PHY

Signed-off-by: Jingju Hou <houjingj@marvell.com>
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>