clk: qcom: gfx3d: add parent to parent request map

In the Linux kernel, the following vulnerability has been resolved:

clk: qcom: gfx3d: add parent to parent request map

After commit d228ece36345 ("clk: divider: remove round_rate() in favor

of determine_rate()") determining GFX3D clock rate crashes, because the

passed parent map doesn't provide the expected best_parent_hw clock

(with the roundd_rate path before the offending commit the

best_parent_hw was ignored).

Set the field in parent_req in addition to setting it in the req,

fixing the crash.

clk_hw_round_rate (drivers/clk/clk.c:1764) (P)

clk_divider_bestdiv (drivers/clk/clk-divider.c:336)

divider_determine_rate (drivers/clk/clk-divider.c:358)

clk_alpha_pll_postdiv_determine_rate (drivers/clk/qcom/clk-alpha-pll.c:1275)

clk_core_determine_round_nolock (drivers/clk/clk.c:1606)

clk_core_round_rate_nolock (drivers/clk/clk.c:1701)

__clk_determine_rate (drivers/clk/clk.c:1741)

clk_gfx3d_determine_rate (drivers/clk/qcom/clk-rcg2.c:1268)

clk_core_determine_round_nolock (drivers/clk/clk.c:1606)

clk_core_round_rate_nolock (drivers/clk/clk.c:1701)

clk_core_round_rate_nolock (drivers/clk/clk.c:1710)

clk_round_rate (drivers/clk/clk.c:1804)

dev_pm_opp_set_rate (drivers/opp/core.c:1440 (discriminator 1))

msm_devfreq_target (drivers/gpu/drm/msm/msm_gpu_devfreq.c:51)

devfreq_set_target (drivers/devfreq/devfreq.c:360)

devfreq_update_target (drivers/devfreq/devfreq.c:426)

devfreq_monitor (drivers/devfreq/devfreq.c:458)

process_one_work (arch/arm64/include/asm/jump_label.h:36 include/trace/events/workqueue.h:110 kernel/workqueue.c:3284)

worker_thread (kernel/workqueue.c:3356 (discriminator 2) kernel/workqueue.c:3443 (discriminator 2))

kthread (kernel/kthread.c:467)

ret_from_fork (arch/arm64/kernel/entry.S:861)