ARM: dts: rockchip: Add missing unit name to memory nodes in rk3288 boards

This patch fixes the following DTC warnings:

"Node /memory has a reg or ranges property, but no unit name"
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288-evb.dtsi

@@ -43,7 +43,7 @@
 #include "rk3288.dtsi"
 
 / {
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-fennec.dts

@@ -46,7 +46,7 @@ / {
 	model = "Rockchip RK3288 Fennec Board";
 	compatible = "rockchip,rk3288-fennec", "rockchip,rk3288";
 
-	memory {
+	memory@0 {
 		reg = <0x0 0x80000000>;
 		device_type = "memory";
 	};

arch/arm/boot/dts/rk3288-firefly-reload-core.dtsi

@@ -45,7 +45,7 @@
 #include "rk3288.dtsi"
 
 / {
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-firefly.dtsi

@@ -44,7 +44,7 @@
 #include "rk3288.dtsi"
 
 / {
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-miqi.dts

@@ -52,7 +52,7 @@ chosen {
 		stdout-path = "serial2:115200n8";
 	};
 
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-popmetal.dts

@@ -48,7 +48,7 @@ / {
 	model = "PopMetal-RK3288";
 	compatible = "chipspark,popmetal-rk3288", "rockchip,rk3288";
 
-	memory{
+	memory@0 {
 		device_type = "memory";
 		reg = <0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-r89.dts

@@ -48,7 +48,7 @@
 / {
 	compatible = "netxeon,r89", "rockchip,rk3288";
 
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x80000000>;
 	};

arch/arm/boot/dts/rk3288-rock2-som.dtsi

@@ -42,7 +42,7 @@
 #include "rk3288.dtsi"
 
 / {
-	memory {
+	memory@0 {
 		reg = <0x0 0x80000000>;
 		device_type = "memory";
 	};

arch/arm/boot/dts/rk3288-veyron.dtsi

@@ -47,7 +47,7 @@
 #include "rk3288.dtsi"
 
 / {
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x80000000>;
 	};