regulator: cpr-regulator: Enable/disable closed-loop CPR on temperature

Add logic to enable/disable closed-loop CPR based on TSENS temperature.
Use the thermal sensor interface which allows monitoring TSENS
temperature thresholds and notifies when the configured threshold is hit.

Use the notification callbacks to disable/enable CPR and force open-loop
voltage.

CRs-Fixed: 903646
Change-Id: Id131f7570740dce4445ce1849ae0551d6207c737
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>