arm: dts: ls1028a updates for network interfaces

Defines LS1028A RDB SGMII port, QDS RGMII port.

Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/arch/arm/dts/fsl-ls1028a-rdb.dts b/arch/arm/dts/fsl-ls1028a-rdb.dts
index 932cfa2..0525389 100644
--- a/arch/arm/dts/fsl-ls1028a-rdb.dts
+++ b/arch/arm/dts/fsl-ls1028a-rdb.dts
@@ -86,3 +86,16 @@
 &usb2 {
 	status = "okay";
 };
+
+&enetc0 {
+	status = "okay";
+	phy-mode = "sgmii";
+	phy-handle = <&rdb_phy0>;
+};
+
+&mdio0 {
+	status = "okay";
+	rdb_phy0: phy@2 {
+		reg = <2>;
+	};
+};