power: qpnp-qg: Battery-temp based ESR enable

Add a logic to ignore ESR based on battery temperature.
This is useful for very-low temperature based charging where
ESR could be way off. The default threshold is set to 10degC
and configurable via  "qcom,esr-low-temp-threshold".

Change-Id: Ic5b918434c63f71c412f782564e7a7aa818da6f1
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>