ARM: dts: vf: Add memory node unit name

Include memory node unit name in order to fix the following W=1
warnings:

Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/vf500-colibri.dtsi

@@ -46,7 +46,7 @@ / {
 	model = "Toradex Colibri VF50 COM";
 	compatible = "toradex,vf610-colibri_vf50", "fsl,vf500";
 
-	memory {
+	memory@80000000 {
 		reg = <0x80000000 0x8000000>;
 	};
 

arch/arm/boot/dts/vf610-colibri.dtsi

@@ -46,7 +46,7 @@ / {
 	model = "Toradex Colibri VF61 COM";
 	compatible = "toradex,vf610-colibri_vf61", "fsl,vf610";
 
-	memory {
+	memory@80000000 {
 		reg = <0x80000000 0x10000000>;
 	};
 };

arch/arm/boot/dts/vf610-cosmic.dts

@@ -19,7 +19,7 @@ chosen {
 		bootargs = "console=ttyLP1,115200";
 	};
 
-	memory {
+	memory@80000000 {
 		reg = <0x80000000 0x10000000>;
 	};
 

arch/arm/boot/dts/vf610-twr.dts

@@ -50,7 +50,7 @@ chosen {
 		bootargs = "console=ttyLP1,115200";
 	};
 
-	memory {
+	memory@80000000 {
 		reg = <0x80000000 0x8000000>;
 	};
 

arch/arm/boot/dts/vf610-zii-dev.dtsi

@@ -49,7 +49,7 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
-	memory {
+	memory@80000000 {
 		reg = <0x80000000 0x20000000>;
 	};
 

arch/arm/boot/dts/vf610m4-colibri.dts

@@ -54,7 +54,7 @@ chosen {
 		linux,stdout-path = "&uart2";
 	};
 
-	memory {
+	memory@8c000000 {
 		reg = <0x8c000000 0x3000000>;
 	};
 };