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

[David Green via llvm-commits]

davemgreen wrote:

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

Into llvm/test/CodeGen/AArch64/vecreduce-add.ll please. There is already a add_v4i32_v4i64_zext/add_v4i32_v4i64_sext, although they look a little different.

Thanks for doing this.

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