ASoC: More amlogic sound-name-prefix DT fixes

Merge series from Alexander Stein <alexander.stein@mailbox.org>:

Following up [1] here are more fix for missing sound-name-prefix
properties in the arch/arm64/boot/dts/amlogic/ subtree.

[1] https://www.spinics.net/lists/devicetree/msg466125.html

Documentation/devicetree/bindings/sound/amlogic,aiu.yaml

@@ -9,6 +9,9 @@ title: Amlogic AIU audio output controller
 maintainers:
   - Jerome Brunet <jbrunet@baylibre.com>
 
+allOf:
+  - $ref: name-prefix.yaml#
+
 properties:
   $nodename:
     pattern: "^audio-controller@.*"
@@ -65,6 +68,8 @@ properties:
   resets:
     maxItems: 1
 
+  sound-name-prefix: true
+
 required:
   - "#sound-dai-cells"
   - compatible

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

@@ -9,13 +9,18 @@ title: Dummy SPDIF Transmitter Device Tree Bindings
 maintainers:
   - Mark Brown <broonie@kernel.org>
 
+allOf:
+  - $ref: name-prefix.yaml#
+
 properties:
   compatible:
     const: linux,spdif-dit
 
   "#sound-dai-cells":
     const: 0
 
+  sound-name-prefix: true
+
 required:
   - "#sound-dai-cells"
   - compatible