ARM: dts: imx6qdl-hummingboard2: Remove leading zero in unit address

Remove the leading zero from unit address to fix the following build
warning with W=1:

arch/arm/boot/dts/imx6dl-hummingboard2.dtb: Warning (unit_address_format): Node /soc/aips-bus@2100000/i2c@21a0000/codec@0a unit name should not have leading 0s
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-hummingboard2.dtsi

@@ -188,7 +188,7 @@ pcf8523: rtc@68 {
 		reg = <0x68>;
 	};
 
-	sgtl5000: codec@0a {
+	sgtl5000: codec@a {
 		clocks = <&clks IMX6QDL_CLK_CKO>;
 		compatible = "fsl,sgtl5000";
 		pinctrl-names = "default";