dt-bindings: watchdog: uniphier: Use unevaluatedProperties

This refers common bindings, so this is preferred for
unevaluatedProperties instead of additionalProperties.

Signed-off-by: Kunihiko Hayashi <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

Documentation/devicetree/bindings/watchdog/socionext,uniphier-wdt.yaml

···
 required:
   - compatible
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |