ARM: dts: chromecast: add missing unit name to /memory node

This patch fixes the following DTC warning with W=1:

"Node /memory has a reg or ranges property, but no unit name"
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

arch/arm/boot/dts/berlin2cd-google-chromecast.dts

@@ -50,7 +50,7 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0x00000000 0x20000000>; /* 512 MB */
 	};