Add an mcu_reset impl for the kiibohd bootloader.

[hydra]

• fixing resetting not working on the Ergodox Infinity.

Description

As per the title. It was missing, and any code that needed to reset the device failed. e.g. os detection and spit keyboard watchdog.

related to #19420 (comment)
one of two PRs that replace: #25959

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Maybe some, not searched for them, however #19420 is partially fixed by this, but also needs fixes from chibios-control to be fully fixed, see: ChibiOS/ChibiOS-Contrib#432

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[github-actions]

Thank you for your contribution!
This pull request has been automatically marked as stale because it has not had activity in the last 45 days. It will be closed in 30 days if no further activity occurs. Please feel free to give a status update now, or re-open when it's ready.
For maintainers: Please label with bug, awaiting review, breaking_change, in progress, or on hold to prevent the issue from being re-flagged.

[hydra]

the upstream change has been merged into chibios.

ChibiOS/ChibiOS-Contrib#432

any chance of a merge?

I've been running this code for over a month now with no issues.

[tzarc]

ChibiOS and ChibiOS-Contrib submodule updates are now on develop. Should be good to go, now.