overlays: Add MAX22007

[jansunil]

Add MAX22007 DAC overlay

PR Description

• Please replace this comment with a summary of your changes, and add any context
  necessary to understand them. List any dependencies required for this change.
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  description and try to push all related PRs simultaneously.

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 compiled my changes, including the documentation
• I have tested the changes on the relevant hardware
• I have updated the documentation outside this repo accordingly
• I have provided links for the relevant upstream lore

[nunojsa]

Please run git log --oneline arch/arm/boot/dts/overlays and see how the commit subject should look like.

[jansunil]

Changelog:

1. Updated copyright year
2. Added size-cells
3. Updated commit tile
   Following were updated based on upstream suggestions:
4. Added mandatory power supplies
5. Replace adi,type-> adi,ch-func (re-used from adi,ad74413r.h)