ARM: dts: s5p: Add missing unit name to memory nodes for S5PV210 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: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/boot/dts/s5pv210-smdkc110.dts

@@ -29,7 +29,7 @@
 		bootargs = "console=ttySAC0,115200n8 root=/dev/mmcblk0p1 rw rootwait ignore_loglevel earlyprintk";
 	};
 
-	memory {
+	memory@20000000 {
 		device_type = "memory";
 		reg = <0x20000000 0x20000000>;
 	};