ARM: shmobile: marzen dts: Use generic names for device nodes

lan0 -> ethernet
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7779-marzen.dts

@@ -42,10 +42,10 @@ fixedregulator3v3: fixedregulator@0 {
 		regulator-always-on;
 	};
 
-	lan0@18000000 {
+	ethernet@18000000 {
 		compatible = "smsc,lan9220", "smsc,lan9115";
 		reg = <0x18000000 0x100>;
-		pinctrl-0 = <&lan0_pins>;
+		pinctrl-0 = <&ethernet_pins>;
 		pinctrl-names = "default";
 
 		phy-mode = "mii";
@@ -176,7 +176,7 @@ du1 {
 		};
 	};
 
-	lan0_pins: lan0 {
+	ethernet_pins: ethernet {
 		intc {
 			renesas,groups = "intc_irq1_b";
 			renesas,function = "intc";