ARM: at91: sama5d3xek: switch sound to CCF

As the sama5d3xek board has switch to CCF, so add clock for wm8904

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Reviwed-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/sama5d3xmb.dtsi

@@ -45,6 +45,8 @@
 				wm8904: wm8904@1a {
 					compatible = "wm8904";
 					reg = <0x1a>;
+					clocks = <&pck0>;
+					clock-names = "mclk";
 				};
 			};