net: ethernet: greth: use phydev from struct net_device

The private structure contain a pointer to phydev, but the structure
net_device already contain such pointer. So we can remove the pointer
phy in the private structure, and update the driver to use the
one contained in struct net_device.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aeroflex/greth.h

@@ -123,7 +123,6 @@ struct greth_private {
 	struct napi_struct napi;
 	spinlock_t devlock;
 
-	struct phy_device *phy;
 	struct mii_bus *mdio;
 	unsigned int link;
 	unsigned int speed;