add support for ltc4162-f/s and ltc4015 battery charger

[kseerp]

PR Description

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

Bindings:

• Add compatible entries for ltc4162-f/s and ltc4015
• Include datasheets for new devices
• Change vendor prefix from lltc to adi

ltc4162:

• Modify functions for battery voltage/current, input voltage/current, charge voltage, die temp, and force telemetry to handle different battery chemistries.

PR Type

• [x] New feature (a change that adds new functionality)
• [ ] Bug fix (a change that fixes an issue)
• [ ] Breaking change (a change that affects other repos or cause CIs to fail)

PR Checklist

• [x] I have conducted a self-review of my own code changes
• [x] I have tested the changes on the relevant hardware
• [ ] I have updated the documentation outside this repo accordingly (if there is the case)