dt-bindings: firmware: scm: Add MSM8996 DT bindings

Add SCM DT bindings for Qualcomm's MSM8996 platform.

Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Sarangdhar Joshi <[e-mail]>
Reviewed-by: Stephen Boyd <[e-mail]>
Acked-by: Bjorn Andersson <[e-mail]>
Signed-off-by: Andy Gross <[e-mail]>

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

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  * "qcom,scm-apq8064" for APQ8064 platforms
  * "qcom,scm-msm8660" for MSM8660 platforms
  * "qcom,scm-msm8690" for MSM8690 platforms
+ * "qcom,scm-msm8996" for MSM8996 platforms
  * "qcom,scm" for later processors (MSM8916, APQ8084, MSM8974, etc)
 - clocks: One to three clocks may be required based on compatible.
+ * No clock required for "qcom,scm-msm8996"
  * Only core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660", and "qcom,scm-msm8960"
  * Core, iface, and bus clocks required for "qcom,scm"
 - clock-names: Must contain "core" for the core clock, "iface" for the interface