[clang] [Clang][AMDGPU] Enable type-checking on __builtin_amdgcn_raw_ptr_buffer_atomic_{{add|fadd|fmin|fmax}} (PR #164824)

[Juan Manuel Martinez Caamaño via cfe-commits]

jmmartinez wrote:

I've rolled back the change for __builtin_amdgcn_raw_ptr_buffer_atomic_fadd_v2f16. I'll fix that in a separate PR.

https://github.com/llvm/llvm-project/pull/164824