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

Instead of listing directly properties typical for SPI peripherals,
reference the spi-peripheral-props.yaml schema.  This allows using all
properties typical for SPI-connected devices, even these which device
bindings author did not tried yet.

Remove the spi-* properties which now come via spi-peripheral-props.yaml
schema, except for the cases when device schema adds some constraints
like maximum frequency.

While changing additionalProperties->unevaluatedProperties, put it in
typical place, just before example DTS.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220816124321.67817-11-krzysztof.kozlowski@linaro.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/temperature/maxim,max31855k.yaml

@@ -32,7 +32,6 @@ properties:
   reg:
     maxItems: 1
 
-  spi-max-frequency: true
   spi-cpha: true
 
 required:
@@ -40,6 +39,7 @@ required:
   - reg
 
 allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - if:
       properties:
         compatible:
@@ -53,7 +53,7 @@ allOf:
       properties:
         spi-cpha: false
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/iio/temperature/maxim,max31856.yaml

@@ -19,7 +19,6 @@ properties:
   reg:
     maxItems: 1
 
-  spi-max-frequency: true
   spi-cpha: true
 
   thermocouple-type:
@@ -34,7 +33,10 @@ required:
   - reg
   - spi-cpha
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/iio/temperature/maxim,max31865.yaml

@@ -25,7 +25,6 @@ properties:
       enables 3-wire RTD connection. Else 2-wire or 4-wire RTD connection.
     type: boolean
 
-  spi-max-frequency: true
   spi-cpha: true
 
 required:
@@ -33,7 +32,10 @@ required:
   - reg
   - spi-cpha
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |