[llvm] [AMDGPU][MC] Allow UC_VERSION_* constant reuse (PR #96461)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `premerge-monolithic-linux` running on `premerge-linux-1` while building `llvm` at step 6 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/153/builds/2193

Here is the relevant piece of the build log for the reference:
```
Step 6 (build-unified-tree) failure: build (failure)

```

https://github.com/llvm/llvm-project/pull/96461