[llvm] [RISCV] Enable floating point CSR alias mnemonics for Zfinx. (PR #108464)

[Yingwei Zheng via llvm-commits]

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

LGTM. These pseudoinstructions are recognized by GNU as with zfinx.


https://github.com/llvm/llvm-project/pull/108464