[llvm] [RISCV] Enable TTI::shouldDropLSRSolutionIfLessProfitable by default (PR #89927)

[Alex Bradbury via llvm-commits]

asb wrote:

> What's the status of this? @asb can you rebase?

I think given the positive review from Philip and your note that you've been using this downstream for some time it's good to land. I'd missed that I hadn't actually hit the merge button yet. I've rebased and will merge now.

https://github.com/llvm/llvm-project/pull/89927