[llvm] [AArch64] Initial sched model for Neoverse N3 (PR #106371)

[via llvm-commits]

FLZ101 wrote:

> OK. I will see if I can try and run something to give it a quick check.

Thanks. I will have more time to work on this MR this weekend.

https://github.com/llvm/llvm-project/pull/106371