ARM: dts: qcom: msm8974: add clocks and clock-names to mmcc device

Add clocks and clock-names nodes to the mmcc device to bind clocks using
the DT links.

Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221204124508.1415713-12-dmitry.baryshkov@linaro.org