ARM: dts: rockchip: add hdmi-sound node to rk3066a

Add hdmi-sound node to rk3066a.dtsi, so that it
can be reused by boards with HDMI support.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/5fe7c2fe-4a38-436a-8017-66989959329a@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rockchip/rk3066a.dtsi

@@ -53,6 +53,22 @@ display-subsystem {
 		ports = <&vop0_out>, <&vop1_out>;
 	};
 
+	hdmi_sound: hdmi-sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "HDMI";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,mclk-fs = <256>;
+		status = "disabled";
+
+		simple-audio-card,codec {
+			sound-dai = <&hdmi>;
+		};
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s0>;
+		};
+	};
+
 	sram: sram@10080000 {
 		compatible = "mmio-sram";
 		reg = <0x10080000 0x10000>;