power/supply: Add support for ltc4162-f/s and ltc4015

Add support for
LTC4162-F 35V/3.2A Multi-Cell LiFePO4 Step-Down Battery Charger
LTC4162-S 35V/3.2A Lead-Acid Step-Down Battery Charger
LTC4015 35V/3.2A Multichemistry Buck Battery Charger Controller

Add chip_info struct to hold the chip specific data.
Modify functions for battery voltage/current, input voltage/current,
charge voltage, die temp, and force telemetry to handle different
battery chemistries.

Signed-off-by: Kim Seer Paller <[email protected]>