[llvm] [CostModel][AArch64] Make extractelement, with fmul user, free whenev… (PR #111479)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

When you say:
> I will amend this patch for in-tree users.

Do you mean to do that here?

https://github.com/llvm/llvm-project/pull/111479