Read the battery temeperature and voltage from the adc driver instead
of hard coding them in the driver.
In the charing began and charing end functions, use
pm8921_bms_get_percent_charge api. This prevents duplicating calling
the adc functions.
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
c448d98e7e