dt-bindings: thermal: sprd: reference thermal-sensor schema

Device is a thermal sensor and it requires '#thermal-sensor-cells', so
reference the thermal-sensor.yaml to simplify it and bring the
common definition of '#thermal-sensor-cells' property.
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240705-dt-bindings-thermal-allof-v1-17-554061b52fbc@linaro.orgSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Documentation/devicetree/bindings/thermal/sprd-thermal.yaml

@@ -11,6 +11,8 @@ maintainers:
   - Baolin Wang <baolin.wang7@gmail.com>
   - Chunyan Zhang <zhang.lyra@gmail.com>
 
+$ref: thermal-sensor.yaml#
+
 properties:
   compatible:
     const: sprd,ums512-thermal
@@ -77,11 +79,10 @@ required:
   - clock-names
   - nvmem-cells
   - nvmem-cell-names
-  - "#thermal-sensor-cells"
   - "#address-cells"
   - "#size-cells"
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |