AMDGPU Driver Ready To Be The Default For Aging Kaveri / Kabini / Mullins APUs

With Linux 6.19 AMD GCN 1.1 and GCN 1.1 dGPUs now default to the AMDGPU driver rather than the legacy Radeon Linux driver. For these Southern Islands and Sea Islands graphics cards it means much better performance, RADV Vulkan support out-of-the-box, and other improved functionality in using this modern AMDGPU kernel graphics driver on Linux. One of the exceptions has been the GCN 1.1 APUs like Kaveri still defaulting to the older Radeon driver but a patch has been volleyed to make that change...