thermal-core: Fix to send correct trip type to get trip temperature

Fix the thermal sys code to pass the proper trip type
expected by tsens driver to get the tsens trip
temperature.

CRs-Fixed: 608753
Change-Id: I527af21bf13d8c5a93b92b34fa5f05c527a08bcd
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>