max77759_charger: cleanup the fg and pmic lookup code

FG to use i2c client data instead of using the power supply interface

make the code that lookup for the pmic i2c client address return the
same values as the that lookup the i2c client address for the FG.

Bug: 183180747
Test: check uevent, charger state
Signed-off-by: AleX Pelosi <[email protected]>
Change-Id: Ibaa52ec7b0746cc14bdc3b33dd10b4438665fa51
1 file changed