fix: allow planck/rev7 to be used with ENCODER_ENABLE = no

[PeterFalken]

Description

Allows planck/rev7 to be used with ENCODER_ENABLE = no

Types of Changes

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

Issues Fixed or Closed by This PR

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).

[PeterFalken]

@jackhumbert, @drashna, this PR fixes a small edge case on #21175 where the planck/rev7 won't compile if ENCODER_ENABLE = no is present in rules.mk. Since both functions (encoder_exec_mapping & encoder_update_kb) share the same method signature an alias can be used as reference.

[jackhumbert]

Thanks for catching that! I merged your changes into #21196 - the encoder map unfortunately doesn't work with this setup, so the aliases aren't needed, but it should work without encoders enabled now :)