[llvm] [AMDGPU] Recognize bf16 image sample data in D16 detection (PR #213272)

[Arseniy Obolenskiy via llvm-commits]

aobolensk wrote:

> Is this valid? Do samples really have bf16 formats? If not this should fail

Thanks, rejected both bf16 and i16 which are indeed have to be rejected in that case. So we emit an error for unsupported cases 

https://github.com/llvm/llvm-project/pull/213272