[PATCH][GAS] aarch64: Enable Cortex-X2 CPU

[Przemyslaw Wirkus]

> Hi Przemyslaw,
> 
> > 2021-09-16  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> >
> > 	* NEWS: Update docs.
> > 	* config/tc-aarch64.c: Add Cortex-X2.
> > 	* doc/c-aarch64.texi: Update docs.
> 
> Approved - please apply.

commit 50aaf5e6ee2687417ca4fe1a596e54a7691828db

> Cheers
>    Nick
>