dt-bindings: i2c: spacemit: extend and validate all properties

Extend the K1 I2C properties by including generic i2c-controller schema.
and this will enable it to do the DT validation check later.

Signed-off-by: Yixun Lan <[email protected]>
Reviewed-by: Troy Mitchell <[email protected]>
Tested-by: Alex Elder <[email protected]>
Acked-by: Conor Dooley <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

Author: dlan17

Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml

@@ -9,6 +9,9 @@ title: I2C controller embedded in SpacemiT's K1 SoC
 maintainers:
   - Troy Mitchell <[email protected]>
 
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
 properties:
   compatible:
     const: spacemit,k1-i2c