[llvm] [RISCV] Split vector FP pseudo instructions by SEW. NFC. (PR #87686)

[Pengcheng Wang via llvm-commits]

https://github.com/wangpc-pp commented:

Thanks! I don't have correctness concerns here but I need a second eye.
And, can you provide some data about how many bytes the MatcherTable will increase?

https://github.com/llvm/llvm-project/pull/87686