[llvm] [RISCV] Add a check in lowerSELECT after foldBinOpIntoSelectIfProfitable (PR #97391)

[Mikhail Gudim via llvm-commits]

mgudim wrote:

@Yunzezhu94 thanks for working on this, looks good. I left some minor comments.

https://github.com/llvm/llvm-project/pull/97391