[llvm] [NFC][AMDGPU] Convert amdpal.ll to autogenerated CHECK lines (PR #141026)

[Harrison Hao via llvm-commits]

harrisonGPU wrote:

> > I think mcpu is tahiti or tonga, may be we can update it? Because I know these are old architecture.
> 
> Add more run lines or a separate test

Okay thanks. :-)

https://github.com/llvm/llvm-project/pull/141026