clk: qcom: gpucc-sc7180: switch to parent_hws

Change several entries of parent_data to use parent_hws instead, which
results in slightly more ovbious code.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230103145515.1164020-17-dmitry.baryshkov@linaro.org