ASoC: dt-bindings: microchip: add sam9x7

Add sam9x7 compatible in the DT documentation.
Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240223172657.672439-1-varshini.rajendran@microchip.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/microchip,sama7g5-i2smcc.yaml

@@ -24,9 +24,14 @@ properties:
     const: 0
 
   compatible:
-    enum:
+    oneOf:
+      - enum:
           - microchip,sam9x60-i2smcc
           - microchip,sama7g5-i2smcc
+      - items:
+          - enum:
+              - microchip,sam9x7-i2smcc
+          - const: microchip,sam9x60-i2smcc
 
   reg:
     maxItems: 1