[llvm] [AArch64] Combine vector FNEG+FMA into `FNML[A|S]` (PR #167900)

[Benjamin Maxwell via llvm-commits]

https://github.com/MacDue commented:

I think you can use `LowerToPredicatedOp` for a few of the `FNEG`s:

https://github.com/llvm/llvm-project/pull/167900