[PATCH][GCC][AArch64] Add support for Cortex-X1

[Przemyslaw Wirkus]

Hi,

This change adds support for the Arm Cortex-X1 CPU in AArch64 GCC. For more
information about this processor, see [0].

[0] : https://www.arm.com/products/cortex-x

OK for master branch ?

kind regards,
Przemyslaw Wirkus

gcc/ChangeLog:

        * config/aarch64/aarch64-cores.def: Add Cortex-X1 Arm core.
        * config/aarch64/aarch64-tune.md: Regenerate.
        * doc/invoke.texi: Add -mtune=cortex-x1 docs.

rb13542.patch
Description: rb13542.patch