dt-bindings: clock: Add documentation for X1830 bindings.

Add documentation for the clock bindings of the X1830 Soc from Ingenic.
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/clock/ingenic,cgu.yaml

@@ -25,6 +25,7 @@ select:
           - ingenic,jz4770-cgu
           - ingenic,jz4780-cgu
           - ingenic,x1000-cgu
+          - ingenic,x1830-cgu
   required:
     - compatible
 
@@ -51,6 +52,7 @@ properties:
         - ingenic,jz4770-cgu
         - ingenic,jz4780-cgu
         - ingenic,x1000-cgu
+        - ingenic,x1830-cgu
       - const: simple-mfd
     minItems: 1