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

[Przemyslaw Wirkus]

Hi,

This change adds support for the Arm Cortex-X1 CPU. 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/arm/arm-cpus.in: Add Cortex-X1 core.
              * config/arm/arm-tables.opt: Regenerate.
              * config/arm/arm-tune.md: Regenerate.
              * doc/invoke.texi: Update docs.

rb13543.patch
Description: rb13543.patch