[clang] [AMDGPU] Do not emit arch dependent macros with unspecified cpu (PR #80035)

[Nico Weber via cfe-commits]

nico wrote:

i.e. it helped with   Clang :: Preprocessor/predefined-arch-macros.c but not with:

Failed Tests (2):
  Clang :: Driver/amdgpu-macros.cl
  Clang :: Driver/target-id-macros.cl

https://github.com/llvm/llvm-project/pull/80035