[llvm] [RISCV][RFC/WIP] Enable load clustering in SelectionDAG scheduler (PR #74600)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

> Reverse ping! @asb Sorry for bothering, what about store clustering? Can we enable it as well?

Sorry I commented the wrong PR.

https://github.com/llvm/llvm-project/pull/74600