msm: thermal: Add support for requesting optimum current for CX rail

Add support for KTM to request for an optimum current value for
CX rail, when the temperature reaches a preset threshold.

During boot-up, KTM monitors the temperature and makes
a request for optimum current.
After boot-up thermal-engine monitors the temperature
and requests for optimum current value through KTM's
sysfs nodes.

CRs-Fixed: 574569
Change-Id: I9fa184e4921f440ef5b5539dc9573527140f2207
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
3 files changed