ARM: dts: BCM5301X: Fix most DTC W=1 warnings

Fix the bulk of the unit_address_vs_reg warnings and unnecessary
\#address-cells/#size-cells without "ranges" or child "reg" property

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm953012er.dts

@@ -39,15 +39,13 @@
 	model = "NorthStar Enterprise Router (BCM953012ER)";
 	compatible = "brcm,bcm953012er", "brcm,brcm53012", "brcm,bcm4708";
 
-	memory {
+	memory@0 {
 		device_type = "memory";
 		reg = <0x00000000 0x8000000>;
 	};
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		wps {
 			label = "WPS";