[llvm] [LV] Also clamp MaxVF by trip count when maximizing vector bandwidth. (PR #149794)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Rebased after landing https://github.com/llvm/llvm-project/pull/149789#discussion_r2222501412

https://github.com/llvm/llvm-project/pull/149794