ARM: dts: k2g: Add keystone net dts files

Add keystone net DT support for k2g evm.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/arch/arm/dts/k2g-evm.dts b/arch/arm/dts/k2g-evm.dts
index de50e8f..0ca36ef 100644
--- a/arch/arm/dts/k2g-evm.dts
+++ b/arch/arm/dts/k2g-evm.dts
@@ -19,3 +19,15 @@
 		stdout-path = &uart0;
 	};
 };
+
+&mdio {
+	status = "okay";
+	ethphy0: ethernet-phy@0 {
+		reg = <0>;
+		phy-mode = "rgmii-id";
+	};
+};
+
+&gbe0 {
+	phy-handle = <&ethphy0>;
+};