[PATCH][GCC 10] AArch64: Add Neoverse N2 tuning model

[Kyrylo Tkachov via Gcc-patches]

This is the GCC 10 version of the Neoverse N2 tuning struct patch.
It's more or less identical.

Bootstrapped and tested on the branch.
Pushing to GCC 10.
Thanks,
Kyrill

gcc/
        * config/aarch64/aarch64.c (neoversen2_tunings): Define.
        * config/aarch64/aarch64-cores.def (neoverse-n2): Use it.

n2-tune-10.patch
Description: n2-tune-10.patch