powerpc/dts/virtex440: Add ethernet phy to virtex440-ml507 board

This adds the marvel phy which is present on the ml507 board.
Without this ethtool causes kernel-oopses.

Tested on ml507 board.
Signed-off-by: Gernot Vormayr <gvormayr@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/boot/dts/virtex440-ml507.dts

@@ -272,6 +272,12 @@ ethernet@81c00000 {
 				xlnx,temac-type = <0>;
 				xlnx,txcsum = <1>;
 				xlnx,txfifo = <0x1000>;
+                                phy-handle = <&phy7>;
+                                clock-frequency = <100000000>;
+                                phy7: phy@7 {
+                                          compatible = "marvell,88e1111";
+                                          reg = <7>;
+                                } ;
 			} ;
 		} ;
 		IIC_EEPROM: i2c@81600000 {