[llvm-branch-commits] [lld] [llvm] AMDGPU: Remove xnack and sramecc subtarget features (PR #212792)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

> This might break downstream user, since it is now requiring to have correct `amdgcn_target` directive if they want to enable that.

It's not exactly a break, the resultant any object should still run

https://github.com/llvm/llvm-project/pull/212792