[llvm] [RISCV] Remove mayLoad = 1 from store-conditional (PR #88470)

[Francis Visoiu Mistrih via llvm-commits]

francisvm wrote:

> Does this have any functional effect? Atomic expansion runs so late, I'm thinking it doesn't.

You’re right, it doesn’t. We were playing with exposing an intrinsic and saw the wrong field by chance.

https://github.com/llvm/llvm-project/pull/88470