ASoC: dt-bindings: nau8822: Add MCLK clock

Add nau8822 master clock input.
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230719124752.248898-3-francesco@dolcini.itSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml

@@ -24,6 +24,12 @@ properties:
   "#sound-dai-cells":
     const: 0
 
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: mclk
+
   nuvoton,spk-btl:
     description:
       If set, configure the two loudspeaker outputs as a Bridge Tied Load output