dt-bindings: clk: qcom,rpmcc: Document QCM2290 compatible

Add compatible for the RPM Clock Controller on the QCM2290 SoC.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20210917030434.19859-3-shawn.guo@linaro.orgAcked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

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

@@ -25,6 +25,7 @@ Required properties :
 			"qcom,rpmcc-msm8994",·"qcom,rpmcc"
 			"qcom,rpmcc-msm8996", "qcom,rpmcc"
 			"qcom,rpmcc-msm8998", "qcom,rpmcc"
+			"qcom,rpmcc-qcm2290", "qcom,rpmcc"
 			"qcom,rpmcc-qcs404", "qcom,rpmcc"
 			"qcom,rpmcc-sdm660", "qcom,rpmcc"
 			"qcom,rpmcc-sm6115", "qcom,rpmcc"