[llvm] [llvm][aarch64] fix copypaste typo (PR #120725)

[via llvm-commits]

klensy wrote:

Where should i put test from https://github.com/llvm/llvm-project/pull/119881#issuecomment-2553841530 ? Somewhere at `./llvm/test/CodeGen/AArch64/`?

https://github.com/llvm/llvm-project/pull/120725