msm: thermal: Support new DT properties to disable KTM feature

Support new device tree properties to selectively disable a feature in KTM.
Do not generate error if properties for this feature is not defined.

Change-Id: I747728f51613b6a0ec8bd7721f88b35a445cd1b3
Acked-by: Jim Granitzki <jamesg@qti.qualcomm.com>
Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>