[clang] [CIR][AMDGPU] Add support for AMDGCN permlane builtins (PR #197526)

[Ayokunle Amodu via cfe-commits]

ayokunle321 wrote:

Hi @ranapratap55! Do you mind reviewing the rest of the PRs I have up (https://github.com/llvm/llvm-project/issues?q=is%3Apr%20state%3Aopen%20author%3Aayokunle321%20AMDGPU%20label%3AClangIR). 

I have addressed all your comments from the past review.

https://github.com/llvm/llvm-project/pull/197526