mfd: dt-bindings: google,cros-ec: Reference Samsung SPI bindings

The ChromeOS Embedded Controller appears on boards with Samsung Exynos
SoC, where Exynos SPI bindings expect controller-data node.  Reference
SPI peripheral bindings which include now Samsung SPI peripheral parts.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220124082347.32747-3-krzysztof.kozlowski@canonical.com

Documentation/devicetree/bindings/mfd/google,cros-ec.yaml

@@ -31,7 +31,7 @@ properties:
 
   controller-data:
     description:
-      SPI controller data, see bindings/spi/spi-samsung.txt
+      SPI controller data, see bindings/spi/samsung,spi-peripheral-props.yaml
     type: object
 
   google,cros-ec-spi-pre-delay:
@@ -148,18 +148,21 @@ patternProperties:
 required:
   - compatible
 
-if:
+allOf:
+  - if:
       properties:
         compatible:
           contains:
             enum:
               - google,cros-ec-i2c
               - google,cros-ec-rpmsg
-then:
+    then:
       properties:
         google,cros-ec-spi-pre-delay: false
         google,cros-ec-spi-msg-delay: false
         spi-max-frequency: false
+    else:
+      $ref: /schemas/spi/spi-peripheral-props.yaml
 
 additionalProperties: false