devicetree: bindings: firmware: add ipq806x to qcom_scm

Add ipq806x to compatible list in qcom_scm Documentation
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20200311130918.753-2-ansuelsmth@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

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

@@ -10,6 +10,7 @@ Required properties:
  * "qcom,scm-apq8064"
  * "qcom,scm-apq8084"
  * "qcom,scm-ipq4019"
+ * "qcom,scm-ipq806x"
  * "qcom,scm-msm8660"
  * "qcom,scm-msm8916"
  * "qcom,scm-msm8960"