[llvm] [AArch64][NEON] Add famax/famin codegen patterns (PR #103027)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

Hi - Matching from a fminimum (denormals aside) sounds like it should be correct, that sounds good. Unfortunately that does make it less useful. Did you consider adding patterns for fminnum with nnan too? They are much more likely to come up in practice if people are using fast-math.

https://github.com/llvm/llvm-project/pull/103027