clk: qcom: dispcc-sm8450: switch to devm_pm_runtime_enable

Switch to using the devm_pm_runtime_enable() instead of hand-coding
corresponding action to call pm_runtime_disable().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230103145515.1164020-20-dmitry.baryshkov@linaro.org