[llvm] [AMDGPU][True16][MC] update vopc profile with AsmMatchConverter (PR #125561)

[Ivan Kosarev via llvm-commits]

https://github.com/kosarev approved this pull request.

LGTM with a nit. I would suggest to change the title to something like 'Generate op_sel operands for VOPC instructions'. There's no benefit in using AsmMatchConverters where we could do without them, so the current title might be a bit confusing.

https://github.com/llvm/llvm-project/pull/125561