ARM: dts: am3517: Add missing unit name to memory nodes

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: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am3517-craneboard.dts

@@ -15,7 +15,7 @@ / {
 	model = "TI AM3517 CraneBoard (TMDSEVM3517)";
 	compatible = "ti,am3517-craneboard", "ti,am3517", "ti,omap3";
 
-	memory {
+	memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>;	/* 256 MB */
 	};

arch/arm/boot/dts/am3517-evm.dts

@@ -13,7 +13,7 @@ / {
 	model = "TI AM3517 EVM (AM3517/05 TMDSEVM3517)";
 	compatible = "ti,am3517-evm", "ti,am3517", "ti,omap3";
 
-	memory {
+	memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>; /* 256 MB */
 	};

arch/arm/boot/dts/am3517_mt_ventoux.dts

@@ -13,7 +13,7 @@ / {
 	model = "TeeJet Mt.Ventoux";
 	compatible = "teejet,mt_ventoux", "ti,omap3";
 
-	memory {
+	memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0x10000000>; /* 256 MB */
 	};