[Keyboard] Fix compile issues for Knops Mini

[drashna]

Description

Fix some of the compilation issues with the board

Types of Changes

• Bugfix
• Keyboard (addition or update)

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).

[daskygit]

Fixed in #13872

[drashna]

hah, I checked real quick but apparently missed it. Thanks!