dt-bindings: clock: qcom,rpmcc: Add MSM8917

Document the qcom,rpmcc-msm8917 compatible.

Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230223180935.60546-4-otto.pflueger@abscue.de