One LLVM cleanup and share device specific info in ac_gpu_info
The first commit is a cleanup since LLVM 7 support has been removed. All other commits move device specific info into ac_gpu_info because it's useless to duplicate them in both drivers.
The first commit is a cleanup since LLVM 7 support has been removed. All other commits move device specific info into ac_gpu_info because it's useless to duplicate them in both drivers.