power: vm-bms: use die-temp compensation for VADC readings

VM-BMS uses VADC to read the battery voltage.
Incorporate die-temp compensation into VADC reading
for better accuracy in SOC calculation.

Change-Id: I91e3ca936da162964c8ebafa09c4a85128ccd2ce
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>