[llvm] [LLVM][MC][DecoderEmitter] Add support to specialize decoder per bitwidth (PR #154865)

[Nico Weber via llvm-commits]

nico wrote:

> Can you show the tablegen command the produced AMDGPUGenDisassemblerTables.inc?

Thanks, that was enough to figure it out (9f42ba358806eaaa8c133fb116d8cc9612cd29fa). Hopefully better now :)

https://github.com/llvm/llvm-project/pull/154865