dt-bindings: mailbox: qcom: Add SM4250 APCS compatible

Add compatible for the Qualcomm SM4250 APCS block.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml

@@ -28,6 +28,7 @@ properties:
               - qcom,sc8180x-apss-shared
               - qcom,sdm660-apcs-hmss-global
               - qcom,sdm845-apss-shared
+              - qcom,sm4250-apcs-hmss-global
               - qcom,sm6125-apcs-hmss-global
               - qcom,sm6115-apcs-hmss-global
               - qcom,sm8150-apss-shared