arm64: dts: rockchip: Enable HDMI audio devices on rk3399-rock960

This commit enable the hdmi-sound and i2s2 devices needed to have
audio over HDMI on both rock960 and the related ficus board.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi

@@ -94,6 +94,10 @@ &hdmi {
 	status = "okay";
 };
 
+&hdmi_sound {
+	status = "okay";
+};
+
 &i2c0 {
 	clock-frequency = <400000>;
 	i2c-scl-rising-time-ns = <168>;
@@ -336,6 +340,10 @@ &i2c4 {
 	status = "okay";
 };
 
+&i2s2 {
+        status = "okay";
+};
+
 &io_domains {
 	bt656-supply = <&vcc1v8_s0>; /* bt656_gpio2ab_ms */
 	audio-supply = <&vcc1v8_s0>; /* audio_gpio3d4a_ms */