[llvm] [LoongArch] fix: Support LoongArch atomic memory operations with monotonic semantics (PR #112681)

[via llvm-commits]

heiher wrote:

> Need some suggestions to simplify this td file.

https://github.com/llvm/llvm-project/blob/2f0b4f43fc5c1e7587c4d00daa9cc230df2f8a2d/llvm/lib/Target/AArch64/AArch64InstrAtomics.td#L528-L536
https://github.com/llvm/llvm-project/blob/2f0b4f43fc5c1e7587c4d00daa9cc230df2f8a2d/llvm/lib/Target/AArch64/AArch64InstrFormats.td#L11919-L11951

https://github.com/llvm/llvm-project/pull/112681