clk: qcom: gpucc-msm8998: switch to parent_hws

Switch gfx3d_clk_src parents to use parent_hws instead of parent_data,
to clarify that these clocks are internal.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
[bjorn: Updated commit message]
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230103145515.1164020-16-dmitry.baryshkov@linaro.org