ARM: shmobile: kzm9g-reference dts: Drop bogus 0x unit-address prefix

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0-kzm9g-reference.dts

@@ -251,7 +251,7 @@ ldo8 {
 		};
 	};
 
-	ak4648: ak4648@0x12 {
+	ak4648: ak4648@12 {
 		#sound-dai-cells = <0>;
 		compatible = "asahi-kasei,ak4648";
 		reg = <0x12>;