recipes-kernel:dtbo: Cleanup dtbo directory and add csm-b79 overlay
All these dtbo files are not needed in machine layer, as they are pulled from meta-mediatek-bsp layer. Only seco-specific files should stay in this layer.
Dear all, On Thursday, 4th September 2025, we will test the new disaster recovery environment. A disaster recovery test will take place between 4:00 PM and 6:00 PM CEST. Please refrain from making any changes, as they will be lost. Once testing is complete, the production environment will be restored. Thank you for your understanding.
All these dtbo files are not needed in machine layer, as they are pulled from meta-mediatek-bsp layer. Only seco-specific files should stay in this layer.