These changes add MDIO and phy lib support to the driver as the
IP core now supports the MDIO bus.

The MDIO bus and phy are added as a child to the emaclite in the device
tree as illustrated below.

mdio {
	#address-cells = <1>;
	#size-cells = <0>;
	phy0: phy@7 {
		compatible = "marvell,88e1111";
		reg = <7>;
	} ;
}
Signed-off-by: NSadanand Mutyala <Sadanand.Mutyala@xilinx.com>
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>