[llvm] [AArch64] Fix SVE cost model for various math intrinsics (PR #184358)

[Paul Walker via llvm-commits]

https://github.com/paulwalker-arm approved this pull request.

FYI: I'm investigating the poor SVE code generation of the minimumnum/maximumnum intrinsics.

https://github.com/llvm/llvm-project/pull/184358