hwmon: qpnp-adc-scale: Fix batt_therm mapping table

Mapping table for batt_therm used for converting voltage
to temperature is incorrect after 65degC. Fix the voltage
to temperature mapping for values after 65degC.

Change-Id: Ib8534a2be3b66f61b4edbe8f283cfee9f873af81
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>