ODROID-M2: dtb/dtbo: Support spdif with pins 29 and 32

- Support spdif using both pins: 29 and 32
- Pins can be set by modifying config.ini
- Only one pin shoud be used for spdif functions
  - If both pins were set as spdif in config.ini, last pin would be ignored

Signed-off-by: phillip.choi <phillip.choi@hardkernel.com>
Change-Id: I3f6e92668189ef040dce12b88f7bef2192bfc9d1

arch/arm64/boot/dts/rockchip/overlays/odroidm2/Makefile

@@ -14,6 +14,8 @@ dtbo-y += \
 	pwm7.dtbo \
 	pwm8.dtbo \
 	rknpu.dtbo \
+	spdif_p29.dtbo \
+	spdif_p32.dtbo \
 	spi0.dtbo \
 	ttyfiq0_115200.dtbo \
 	uart0-with-ctsrts.dtbo \

arch/arm64/boot/dts/rockchip/overlays/odroidm2/spdif_p29.dts

@@ -0,0 +1,31 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target = <&spdif_tx_sound>;
+
+		__overlay__ {
+			status = "okay";
+			simple-audio-card,cpu {
+				sound-dai = <&spdif_tx1>;
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&spdif_tx_dc>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&spdif_tx1>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};

arch/arm64/boot/dts/rockchip/overlays/odroidm2/spdif_p32.dts

@@ -0,0 +1,28 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target = <&spdif_tx_sound>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&spdif_tx_dc>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&spdif_tx0>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};