ARM: sun7i: Enable cubieboard2 audio codec

The cubieboard2 uses the internal codec to output sound to its mini-jack.
Enable it.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun7i-a20-cubieboard2.dts

@@ -84,6 +84,10 @@ &ahci {
 	status = "okay";
 };
 
+&codec {
+	status = "okay";
+};
+
 &cpu0 {
 	cpu-supply = <&reg_dcdc2>;
 };