[RISCV][VLOPT] Fix operand check in isVectorOpUsedAsScalarOp#112253

lukel97 merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

lukel97:vloptimizer/isVectorOpUsedAsScalarOp-remove-passthru-checklukel97/llvm-project:vloptimizer/isVectorOpUsedAsScalarOp-remove-passthru-checkCopy head branch name to clipboard