[llvm] [RISCV][CostModel] Make VMV_S_* and VMV_*_S cost independent of LMUL (PR #78739)

[Shih-Po Hung via llvm-commits]

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@@ -475,10 +481,9 @@ InstructionCost RISCVTTIImpl::getShuffleCost(TTI::ShuffleKind Kind,
 
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arcbbb wrote:

Understood! Let's consider revisiting it when it becomes more relevant!

https://github.com/llvm/llvm-project/pull/78739