ARM: dts: exynos: Add missing unit name to memory nodes in Exynos5 DTS

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 <krzk@kernel.org>
diff --git a/arch/arm/boot/dts/exynos5440-sd5v1.dts b/arch/arm/boot/dts/exynos5440-sd5v1.dts
index afd21a4..ad6f533b 100644
--- a/arch/arm/boot/dts/exynos5440-sd5v1.dts
+++ b/arch/arm/boot/dts/exynos5440-sd5v1.dts
@@ -21,7 +21,7 @@
 	};
 
 	/* FIXME: set reg property with correct start address and size */
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0 0>;
 	};