[llvm] [RISCV] Use VECREDUCE_OR instead of VP_REDUCE_OR in combineVectorSizedSetCCEquality. NFCish (PR #207122)

[Luke Lau via llvm-commits]

https://github.com/lukel97 approved this pull request.

LGTM, looks like it will get legalized to a vp_reduce if it needs widened

https://github.com/llvm/llvm-project/blob/b25e5be70aa7d335f07d95b4484e5638544f0f98/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp#L8618-L8633

https://github.com/llvm/llvm-project/pull/207122