ARM: sun7i: Add audio codec clock

The audio codec functional clock is a child of PLL2 and is used to control
the audio rate, enable it in the DT.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun7i-a20.dtsi

@@ -47,6 +47,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/thermal/thermal.h>
 
+#include <dt-bindings/clock/sun4i-a10-pll2.h>
 #include <dt-bindings/dma/sun4i-a10.h>
 #include <dt-bindings/pinctrl/sun4i-a10.h>
 
@@ -500,6 +501,14 @@ spi3_clk: clk@01c200d4 {
 			clock-output-names = "spi3";
 		};
 
+		codec_clk: clk@01c20140 {
+			#clock-cells = <0>;
+			compatible = "allwinner,sun4i-a10-codec-clk";
+			reg = <0x01c20140 0x4>;
+			clocks = <&pll2 SUN4I_A10_PLL2_1X>;
+			clock-output-names = "codec";
+		};
+
 		mbus_clk: clk@01c2015c {
 			#clock-cells = <0>;
 			compatible = "allwinner,sun5i-a13-mbus-clk";