dt-bindings: thermal: allwinner,sun8i-a83t-ths: 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: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
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-v1-3-554061b52fbc@linaro.orgSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml

@@ -10,6 +10,8 @@ maintainers:
   - Vasily Khoruzhick <anarsoul@gmail.com>
   - Yangtao Li <tiny.windzz@gmail.com>
 
+$ref: thermal-sensor.yaml#
+
 properties:
   compatible:
     enum:
@@ -55,7 +57,6 @@ properties:
     maxItems: 1
     description: phandle to device controlling temperate offset SYS_CFG register
 
-  # See Documentation/devicetree/bindings/thermal/thermal-sensor.yaml for details
   "#thermal-sensor-cells":
     enum:
       - 0
@@ -135,9 +136,8 @@ required:
   - compatible
   - reg
   - interrupts
-  - '#thermal-sensor-cells'
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |