ARM: zynq: DT: Add Ethernet phys

Add missing Ethernet phys to Zynq DTs.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-zc702.dts

@@ -45,6 +45,11 @@
 &gem0 {
 	status = "okay";
 	phy-mode = "rgmii-id";
+	phy-handle = <&ethernet_phy>;
+
+	ethernet_phy: ethernet-phy@7 {
+		reg = <7>;
+	};
 };
 
 &i2c0 {