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/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
index 72f89c8..9fafe10 100644
--- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
@@ -79,7 +79,7 @@
 
 	};
 
-	memory {
+	memory@20000000 {
 		device_type = "memory";
 		reg = <0x20000000 0x80000000>;
 	};