arm64: dts: rockchip: enable hdmi tx audio on rock-3a

Enable the I2S0 controller and the hdmi-sound node on the Radxa
ROCK3 Model A.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220614230354.3756364-2-michael.riesch@wolfvision.net
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts

@@ -196,6 +196,10 @@
 	};
 };
 
+&hdmi_sound {
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 
@@ -436,6 +440,10 @@
 	};
 };
 
+&i2s0_8ch {
+	status = "okay";
+};
+
 &i2s1_8ch {
 	rockchip,trcm-sync-tx-only;
 	status = "okay";