arm64: dts: qcom: qcs404: add xo clock to rpm clock controller

Populate the rpm clock controller node with clocks and clock-names
properties.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221226042154.2666748-17-dmitry.baryshkov@linaro.org