arm: dts: fix unit-address leading 0s

Fix dtc warnings for 'simple_bus_reg' due to leading 0s. Converted using
the following command:

perl -p -i -e 's/\@0+([0-9a-f])/\@$1/g' `find arch/arm/boot/dts -type -f -name '*.dts*'

Dropped changes to ARM, Ltd. boards LED nodes and manually fixed up some
occurrences of uppercase hex.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/imx6ul-tx6ul.dtsi

@@ -362,7 +362,7 @@
 	clock-frequency = <400000>;
 	status = "okay";
 
-	sgtl5000: codec@0a {
+	sgtl5000: codec@a {
 		compatible = "fsl,sgtl5000";
 		reg = <0x0a>;
 		#sound-dai-cells = <0>;