dt-bindings: firmware: scm: Add SM6350 compatible

Add devicetree compatible for SCM on SM6350 SoC.
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211213082614.22651-3-luca.weiss@fairphone.com

Documentation/devicetree/bindings/firmware/qcom,scm.txt

@@ -26,6 +26,7 @@ Required properties:
  * "qcom,scm-sc7280"
  * "qcom,scm-sdm845"
  * "qcom,scm-sdx55"
+ * "qcom,scm-sm6350"
  * "qcom,scm-sm8150"
  * "qcom,scm-sm8250"
  * "qcom,scm-sm8350"