dt-bindings: firmware: scm: Add MSM8998 and SDM845

Now that the compatible/clock handling is reworked add compatibles for
MSM8998 and SDM845 to the SCM binding.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

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

@@ -14,7 +14,9 @@ Required properties:
  * "qcom,scm-msm8960"
  * "qcom,scm-msm8974"
  * "qcom,scm-msm8996"
+ * "qcom,scm-msm8998"
  * "qcom,scm-ipq4019"
+ * "qcom,scm-sdm845"
  and:
  * "qcom,scm"
 - clocks: Specifies clocks needed by the SCM interface, if any: