The AMDGPU check was added in https://github.com/llvm/llvm-project/pull/123670 where the reasoning seems to be that the NVIDIA SDK will provide `vprintf` for the NVPTX case and AMDGPU was the only other supported target at the time. SPIR-V also needs this stubbed out, so just check that it's not NVPTX. Signed-off-by: Nick Sarnie <nick.sarnie@intel.com>