ASoC: dt-bindings: linux,spdif: Convert spdif-reciever.txt to dtschema

Convert the dummy SPDIF receiver bindings to DT schema.

Signed-off-by: Animesh Agarwal <[e-mail]>
Cc: Daniel Baluta <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Acked-by: Neil Armstrong <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/linux,spdif-dit.yaml Documentation/devicetree/bindings/sound/linux,spdif.yaml

···
 # SPDX-License-Identifier: GPL-2.0
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/sound/linux,spdif-dit.yaml#
+$id: http://devicetree.org/schemas/sound/linux,spdif.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Dummy SPDIF Transmitter
+title: Dummy SPDIF Transmitter/Receiver
 
 maintainers:
   - Mark Brown <[e-mail]>
···
 
 properties:
   compatible:
-    const: linux,spdif-dit
+    enum:
+      - linux,spdif-dit
+      - linux,spdif-dir
 
   "#sound-dai-cells":
     const: 0

Documentation/devicetree/bindings/sound/spdif-receiver.txt

···
-Device-Tree bindings for dummy spdif receiver
-
-Required properties:
-	- compatible: should be "linux,spdif-dir".
-
-Example node:
-
-	codec: spdif-receiver {
-		compatible = "linux,spdif-dir";
-	};