[PATCH] AArch64: Add Neoverse N2 tuning model

[Kyrylo Tkachov via Gcc-patches]

Hi all,

This patch adds a tuning structure for Neoverse N2 to allow for further tuning.
For now it's just a deduplication of the Neoverse N1 struct that it was reusing 
but with the SVE width set to 128.

Bootstrapped and tested on aarch64-none-linux-gnu.
Pushing to trunk and will push similar patches to the branches where 
-mcpu=neoverse-n2 is supported.

Thanks,
Kyrill

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

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