drivers/thermal/cpufreq_cooling: Update outdated comments

The code has moved and left some comments stale. Update them where
there is a need.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20220613124327.30766-4-lukasz.luba@arm.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>