[clang] [llvm] [AMDGPU][WIP] Extend permlane16, permlanex16 and permlane64 intrinsic lowering for generic types (PR #92725)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

On this and the previous, can you add a section to AMDGPUUsage for the intrinsics and what types they support 

https://github.com/llvm/llvm-project/pull/92725