thermal: tsens: Modify tsens_poll

Add support to log the last 10 instances when the
tsens monitoring threshold test gets to run and
handles completion interrupt or in polling mode.
In addition clear the status before enabling the
interrupt mask for threshold monitoring and reduce
the timed wait completion during polling mode.

Change-Id: I75a376b209f15d33cdfe3e43806db0f0cf45538e
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>