[PATCH][GCC] aarch64: enable cortex-x2 CPU

[Przemyslaw Wirkus via Gcc-patches]

Patch is adding 'cortex-x2' to -mcpu command line option.

OK for master?

gcc/ChangeLog:

2021-09-02  Przemyslaw Wirkus  <przemyslaw.wir...@arm.com>

        * config/aarch64/aarch64-cores.def (AARCH64_CORE): New
        Cortex-X2 core.
        * config/aarch64/aarch64-tune.md: Regenerate.
        * doc/invoke.texi: Update docs.

rb14825.patch
Description: rb14825.patch