BCM270X_DT: Rename Pi Zero W DT files

The downtream Pi Zero W dts file uses the digit 0, whereas upstream
chose to spell it out - "zero-w". The firmware has, for a long time,
looked for bcm2708-rpi-zero-w.dtb first before falling back to the
numerical version. Therefore it is better to follow upstream and
make the switch to "bcm2708-rpi-zero-w".

At the same time, remove some overrides that duplicate values
inherited from the shared .dtsi files.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

arch/arm/boot/dts/Makefile

@@ -4,7 +4,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2708-rpi-b.dtb \
 	bcm2708-rpi-b-plus.dtb \
 	bcm2708-rpi-cm.dtb \
-	bcm2708-rpi-0-w.dtb \
+	bcm2708-rpi-zero-w.dtb \
 	bcm2709-rpi-2-b.dtb \
 	bcm2710-rpi-3-b.dtb \
 	bcm2710-rpi-3-b-plus.dtb \

arch/arm/boot/dts/bcm2708-rpi-0-w.dts → arch/arm/boot/dts/bcm2708-rpi-zero-w.dts

@@ -132,15 +132,10 @@
 };
 
 &i2s {
-	#sound-dai-cells = <0>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2s_pins>;
 };
 
-&random {
-	status = "okay";
-};
-
 &leds {
 	act_led: act {
 		label = "led0";