ARM: dts: at91: sam9x60: Add macb0 Ethernet controller

Add Ethernet controller to dtsi file and enable it on sam9x60ek
platform connected with rmii.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
index e64566e..6fe9f19 100644
--- a/arch/arm/dts/sam9x60ek.dts
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -17,3 +17,8 @@
 		stdout-path = &dbgu;
 	};
 };
+
+&macb0 {
+	phy-mode = "rmii";
+	status = "okay";
+};