[llvm] [RISCV] Don't run combineBinOp_VLToVWBinOp_VL until after legalize types. NFCI (PR #84125)

[Luke Lau via llvm-commits]

lukel97 wrote:

> Does this have any effect on #83654?

No, but I don't think #83654 is related. It doesn't seem to reproduce on ba81477e9cdb5384a10c700ee247562f0f6c03e6, I've left some comments over on the issue.

https://github.com/llvm/llvm-project/pull/84125