dt-bindings: Remove leading 0x from bindings notation

Improve the binding example by removing all the leading 0x to fix the
following dtc warnings:

Warning (unit_address_format): Node /XXX unit name should not have leading "0x"

Converted using the following command:

find Documentation/devicetree/bindings -name "*.txt" -exec sed -i -e 's/([^ ])\@0x([0-9a-f])/$1\@$2/g' {} +

This is a follow up to commit 48c926cd3414

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/sound/max98371.txt b/Documentation/devicetree/bindings/sound/max98371.txt
index 6c28523..8b2b270 100644
--- a/Documentation/devicetree/bindings/sound/max98371.txt
+++ b/Documentation/devicetree/bindings/sound/max98371.txt
@@ -10,7 +10,7 @@
 Example:
 
 &i2c {
-	max98371: max98371@0x31 {
+	max98371: max98371@31 {
 		compatible = "maxim,max98371";
 		reg = <0x31>;
 	};