[AMDGPU] Add sema check for global_atomic_fadd_v2f16 builtin#158145

tcgu-amd wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

tcgu-amd:users/tcgu/builtin-sematcgu-amd/llvm-project:users/tcgu/builtin-semaCopy head branch name to clipboard