Draft: Resolve "Waveshare HDMI/DVI screens are behaving really badly on Pi4/KMS"

Thank you for your contribution!

Please make sure your Merge Request is ready to be merged:

• a line describing your modifications has been added to CHANGELOG.md
• a line describing tests to make before release has been added to TESTING.md
• if the Merge Request is about a new feature, an improvement or an important bugfix, amend RELEASE-NOTES.md
• you respected conventional commits
• you updated the wiki Please it is important 🙏 !

The results of the build can give you clues about what is missing in your Merge Request.

Changes :

• Add drmadapter package for Pi4

Related to #1971