ARM: at91: dt: sama5d4ek: add and enable wm8904

Add wm8904 codec node and enable it.
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91-sama5d4ek.dts

@@ -131,6 +131,13 @@ m25p80@0 {
 
 			i2c0: i2c@f8014000 {
 				status = "okay";
+
+				wm8904: codec@1a {
+					compatible = "wlf,wm8904";
+					reg = <0x1a>;
+					clocks = <&pck2>;
+					clock-names = "mclk";
+				};
 			};
 
 			macb0: ethernet@f8020000 {