ARM: mvebu: armada-xp: Add RGMII pinctrl to Lenovo ix4-300d

Lenovo ix4-300d has two ethernet PHYs connected via RGMII. Add the
corresponding pinctrl settings.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-By: Benoit Masson <yahoo@perenite.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/armada-xp-lenovo-ix4-300d.dts

@@ -66,12 +66,16 @@ phy1: ethernet-phy@1 { /* Marvell 88E1318 */
 			};
 
 			ethernet@70000 {
+				pinctrl-0 = <&pmx_ge0_rgmii>;
+				pinctrl-names = "default";
 				status = "okay";
 				phy = <&phy0>;
 				phy-mode = "rgmii-id";
 			};
 
 			ethernet@74000 {
+				pinctrl-0 = <&pmx_ge1_rgmii>;
+				pinctrl-names = "default";
 				status = "okay";
 				phy = <&phy1>;
 				phy-mode = "rgmii-id";