thermal: qpnp-adc-tm: add new scale function for skue battery thermistor

The skue is using the different battery thermistor and mapping table
from the default. A new scale function is needed to use this mapping
table in the thermal adc driver.

Change-Id: I96af698697fa65b8846a89ca2108e809fdf229e7
Signed-off-by: Chunmei Cai <ccai@codeaurora.org>
Signed-off-by: Jiangen Jiao <jiangenj@codeaurora.org>