[nrf52] add settings for dcdc converter

[tomaszduda23]

What does this implement/fix?

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code quality improvements to existing code or addition of tests
• Other

Related issue or feature (if applicable):

• fixes

Pull request in esphome-docs with documentation (if applicable):

• esphome/esphome-docs#

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx
• nRF52840

Example entry for config.yaml:

# Example config.yaml

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

esphome/esphome-docs#5596

[github-actions]

To use the changes from this PR as an external component, add the following to your ESPHome configuration YAML file:

external_components:
  - source: github://pr#11841
    components: [nrf52]
    refresh: 1h

---

(Added by the PR bot)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.39%. Comparing base (661920c) to head (5765f38).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #11841      +/-   ##
==========================================
- Coverage   72.43%   72.39%   -0.04%     
==========================================
  Files          53       53              
  Lines       11134    11134              
  Branches     1504     1504              
==========================================
- Hits         8065     8061       -4     
- Misses       2677     2680       +3     
- Partials      392      393       +1     

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[bdraco]

Please see comments on the linked docs PR

[tomaszduda23]

Please see comments on the linked docs PR

Thanks for checking. It has been fixed.