Address comments

Author: arcbbb

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -86,8 +86,6 @@ RISCVTTIImpl::getRISCVInstructionCost(ArrayRef<unsigned> OpCodes, MVT VT,
  }
  case RISCV::VMV_X_S:
  case RISCV::VFMV_F_S:
- Cost += 1;
- break;
  case RISCV::VMV_S_X:
  case RISCV::VFMV_S_F:
  Cost += 1;