dt-bindings: eeprom: at25: 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>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220727164424.386499-1-krzysztof.kozlowski@linaro.org

Documentation/devicetree/bindings/eeprom/at25.yaml

@@ -44,8 +44,6 @@ properties:
   reg:
     maxItems: 1
 
-  spi-max-frequency: true
-
   pagesize:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]
@@ -105,6 +103,7 @@ required:
   - spi-max-frequency
 
 allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - if:
       properties:
         compatible:
@@ -117,7 +116,7 @@ allOf:
         - size
         - address-width
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |