[llvm] [AMDGPU] Fix operand definitions for atomic scalar memory instructions. (PR #71799)

[Ivan Kosarev via llvm-commits]

kosarev wrote:

> No test changes?

Nope. Same as with the changes fixing subtarget predicates, this removes the dependency on the order AsmMatcherEmitter happens to match instructions in, so no easy ways to test this, it seems.

https://github.com/llvm/llvm-project/pull/71799