[clang] [llvm] [AMDGPU] Restrict `@llvm.amdgcn.image.*` intrinsic's dmask argument (PR #179511)

[Alexey Sachkov via cfe-commits]

AlexeySachkov wrote:

> Can you please edit the title to be a bit less generic?

I wanted to do it on the second iteration of the review, but somehow couldn't find the edit title button. The title should be better now.

https://github.com/llvm/llvm-project/pull/179511