T6584: Revert "T6293: add Mediatek MT7921 to defconfig"

[c-po]

Change Summary

The Wifi card does not boot up properly on the 6.6 Kernel series and causes panics.

It looks like this is fixe din Kernel 6.8 thus it should be re-enabled once we upgrade to the 2024 Kernel LTS version

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe): revert changes

Related Task(s)

• https://vyos.dev/T6293
• https://vyos.dev/T6584

Related PR(s)

• https://github.com/vyos/vyos-build/pull/584/commits

Component(s) name

Kernel

Proposed changes

How to test

Boot system with MT7921 m.2 WIFI NIC

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

❌
PR title 'Kernel changes' does not match the required format!. Valid title example: T99999: make IPsec secure

[c-po]

@Mergifyio backport circinus sagitta

[mergify]

backport circinus sagitta

✅ Backports have been created

• #700 T6584: Revert "T6293: add Mediatek MT7921 to defconfig" (backport #699) has been created for branch circinus
• #701 T6584: Revert "T6293: add Mediatek MT7921 to defconfig" (backport #699) has been created for branch sagitta