dt-bindings: thermal: ti,am654: 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.

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-v1-19-554061b52fbc@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Author: krzk

Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml

@@ -9,6 +9,8 @@ title: Texas Instruments AM654 VTM (DTS)
 maintainers:
   - Keerthy <j-keerthy@ti.com>
 
+$ref: thermal-sensor.yaml#
+
 properties:
   compatible:
     const: ti,am654-vtm
@@ -26,9 +28,8 @@ required:
   - compatible
   - reg
   - power-domains
-  - "#thermal-sensor-cells"
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |