thermal: msm: tsens: Notify thermal framework on threshold cross

Notify thermalsys framework and thereby the driver, using the new
sensor api. Notification is done in the interrupt handler context to
the thermal framework.

Change-Id: Ifdb958105d8d0d9d8987a4e64114101ee44047d2
Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>