driver: regulator: Add support for AXP2101 PMIC

[ranranff]

Add initial driver for the AXP2101 PMIC
Support:

• DCDC1-5
• LDOA1-A4, LDOB1-B2, LDOC1, LDOD1-D2

Change-Id: I3f93900423ec592a44d7e80a4353672c63cfa3a4

[github-actions]

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[kartben]

Thanks much for the PR! I will let others chime in but IMO it would be best to directly introduce this as an MFD device similar to AXP192 since the fuel_gauge side of this PMIC is more than likely something we'll want to support too.

[gmarull]

this PR has numerous issues, like eg duplicating common DT properties or misusing them like min/max microvolt. Please, check regulators API and contributing guidelines.

[ranranff]

this PR has numerous issues, like eg duplicating common DT properties or misusing them like min/max microvolt. Please, check regulators API and contributing guidelines.

Sorry, this has been closed by a mistake. I have create new one #78098