clk: qcom: cpu-8996: switch to devm_clk_notifier_register

Switch to using devres-managed version of clk_notifier_register(). This
allows us to drop driver's remove() callback.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220714100351.1834711-3-dmitry.baryshkov@linaro.org