ARM: ux500: Add AB8500 CODEC node to DB8500 Device Tree

Ensure correct probing and pass though important configuration
options to the AB8500 CODEC driver when DT is enabled
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/dbx5x0.dtsi

@@ -392,6 +392,12 @@
 					compatible = "stericsson,ab8500-debug";
 				};
 
+				codec: ab8500-codec {
+					compatible = "stericsson,ab8500-codec";
+
+					stericsson,earpeice-cmv = <950>; /* Units in mV. */
+				};
+
 				ab8500-regulators {
 					compatible = "stericsson,ab8500-regulator";