[RISCV][NFC] Refactor some rvv instructions' definition with foreach.

[jacquesguan]

Summary

Simplify rvv instructions that use eew in their mnemonic and encoding with
foreach.

[frasercrmck]

llvm/lib/Target/RISCV/RISCVInstrInfoV.td

859

This part is changing from VLSSched<32> to VLSSched<64>. I assume that 32 is a bug?

[jacquesguan]

llvm/lib/Target/RISCV/RISCVInstrInfoV.td

859

Yes, I think so.

[frasercrmck]

LGTM.

[jrtc27]

llvm/lib/Target/RISCV/RISCVInstrInfoV.td

859

Drop the [NFC] from the commit subject then, as it's not true

859

(and explicitly mention this functional change in the body)

[frasercrmck]

llvm/lib/Target/RISCV/RISCVInstrInfoV.td

859

Ah yes good catch. I agree.

[jacquesguan]

Remove [NFC] and add commit information.