[llvm] [RISCV] Lower vector_reverse for zvfhmin/zvfbfmin (PR #110218)

[Philip Reames via llvm-commits]

https://github.com/preames approved this pull request.

LGTM

Luke - Your comment about work required for my alternate testing approach is sufficient for me to be okay with this as a stepping stone.  Once you get the fixed vector bits working, please make sure you add shuffle testing for this as well.  

https://github.com/llvm/llvm-project/pull/110218