[llvm] LegalizeVectorTypes: fix bug in widening of vec result in xrint (PR #71198)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

Figured it out! There were conflicts between avx and avx512f: the only problem with UTC is that it wasn't reporting conflicts! Fixed now.

https://github.com/llvm/llvm-project/pull/71198