clk: qcom: cpu-8996: move ACD logic to clk_cpu_8996_pmux_determine_rate

Rather than telling everybody that we are using PLL as a parent (and
using ACD clock instead) properly select ACD as a pmux parent clock.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220714100351.1834711-5-dmitry.baryshkov@linaro.org