[llvm] [AMDGPU] Prevent clauses with incompatible scopes on gfx1250-strict (PR #218788)

[Jay Foad via llvm-commits]

jayfoad wrote:

I think we could enforce this check for all architectures, not just gfx1250-strict. Even if it is allowed to clause memory instructions with different cache policies on some architectures, it probably does not happen very often, and it probably does not help performance when it does happen.

No objection to the patch.

https://github.com/llvm/llvm-project/pull/218788