dt-bindings: soc: samsung: exynos-pmu: Constrain google,pmu-intr-gen-syscon

PMU interrupt generation block is not present in older Samsung Exynos
SoCs, so restrict the property to Google GS101 only.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250525190630.41858-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: krzk

Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml

@@ -203,6 +203,9 @@ allOf:
     then:
       required:
         - google,pmu-intr-gen-syscon
+    else:
+      properties:
+        google,pmu-intr-gen-syscon: false
 
 examples:
   - |