Add support for MAX31875

[jemfgeronimo]

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PR Description

• This adds support for the MAX31875 temperature sensor within the MAX31827 driver, along with corresponding device tree bindings.
• Datasheet: MAX31875
• Tested on RPI4 with MAX31875EVKIT

PR Type

• [ ] Bug fix (a change that fixes an issue)
• [x] New feature (a change that adds new functionality)
• [ ] 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
• [ ] I have tested the changes on the relevant hardware
• [ ] I have updated the documentation outside this repo accordingly (if there is the case)

[nunojsa]

Why the new PR? Should we close #2600?

[jemfgeronimo]

Why the new PR? Should we close #2600?

I've created this separate PR that introduces an alternative method to add driver support for the MAX31875. This involves using the existing MAX31827 driver to support the MAX31875.

[jemfgeronimo]

V2

• dt-bindings: reverted enum of adi,fault-q
• dt-bindings: dropped else branch in adi,fault-q
• drivers: put error handling of fault queue values before its encoding
• renamed max31827_chip_info to max31827_hwmon_chip_info
• add chip_info structure to replace enum chips

[jemfgeronimo]

V3

• reduced the fields of the chip_info

[nunojsa]

Hi, I'm just checking in on the status of this pull request. Is there anything I can do to help move it forward?