Add driver support for MAX42500

[kentlibe]

PR Description

• This adds driver support for the MAX42500 Industrial Power System Monitor Family, along with corresponding device tree bindings.
• Datasheet MAX42500
• Tested in RPI4 with MAX42500_EVKIT_P1.

PR Type

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

PR Checklist

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

[nunojsa]

Is this still WIP? As it stands it's not really ready for reviewing... Please make sure to address CI complains and to re-organize your commits. Merge commits don't really make sense (rebase your dev branch) and please run git lon --oneline <DIR_YOU'RE_CHANGING> so you can the git log style for that subsystem. Then, please follow the same style. Also note that a commit as Cleanup MAX42500 Linux driver. is not fine. You need to explain what you're actually cleaning and why...