dt-bindings: clock: qcom: rpmcc: Document MDM9607 compatible

Add the dt-binding for the RPM Clock Controller on the MDM9607 SoC.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210805222400.39027-1-konrad.dybcio@somainline.orgSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/qcom,rpmcc.txt

@@ -10,6 +10,7 @@ Required properties :
 - compatible : shall contain only one of the following. The generic
                compatible "qcom,rpmcc" should be also included.
 
+			"qcom,rpmcc-mdm9607", "qcom,rpmcc"
 			"qcom,rpmcc-msm8660", "qcom,rpmcc"
 			"qcom,rpmcc-apq8060", "qcom,rpmcc"
 			"qcom,rpmcc-msm8226", "qcom,rpmcc"