thermal: tsens8960: Add suspend/resume for TSENS

TSENS does not operate reliably during VDD_CX minimization.

Incorrect temperature readings are reported on some instances
when Apps processor comes out of suspend. This leads the
TSENS reporting incorrect temperature during system resume.

Change-Id: I882b37fbe290477926c3a242d3092be8b950dfab
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
[davidb: only drivers/thermal]
Signed-off-by: David Brown <davidb@codeaurora.org>