[llvm] [RISCV] Don't cost vector arithmetic fp ops as cheaper than scalar (PR #99594)

[Luke Lau via llvm-commits]

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@@ -1667,7 +1667,6 @@ InstructionCost RISCVTTIImpl::getArithmeticInstrCost(
     return BaseT::getArithmeticInstrCost(Opcode, Ty, CostKind, Op1Info, Op2Info,
                                          Args, CxtI);
 
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lukel97 wrote:

clang-format won't let me get rid of this 

https://github.com/llvm/llvm-project/pull/99594