dt-bindings: iio: frequency: use spi-peripheral-props.yaml

For devices connectable by SPI bus (e.g. already using
"spi-max-frequency" property), reference the "spi-peripheral-props.yaml"
schema to allow using all SPI device properties, even these which device
bindings author did not tried yet.

While changing additionalProperties->unevaluatedProperties, put it in
typical place, just before example DTS.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221004115642.63749-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/frequency/adi,adf4350.yaml

@@ -160,13 +160,16 @@ properties:
       2: +2dBm
       3: +5dBm
 
-additionalProperties: false
-
 required:
   - compatible
   - reg
   - clocks
 
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
 examples:
   - |
     spi {

Documentation/devicetree/bindings/iio/frequency/adi,admv1013.yaml

@@ -70,7 +70,10 @@ required:
   - clock-names
   - vcm-supply
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/iio/frequency/adi,admv1014.yaml

@@ -104,7 +104,10 @@ required:
   - clock-names
   - vcm-supply
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/iio/frequency/adi,admv4420.yaml

@@ -37,7 +37,11 @@ required:
   - compatible
   - reg
 
-additionalProperties: false
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/iio/frequency/adi,adrf6780.yaml

@@ -113,7 +113,10 @@ required:
   - clocks
   - clock-names
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |