[PATCH][GAS] aarch64: add armv9-a architecture to -march

[Przemyslaw Wirkus]

> Hi Przemyslaw,
> 
> > 2021-09-20  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> >
> > 	* config/tc-aarch64.c: Add 'armv9-a' command line flag.
> > 	* docs/c-aarch64.text: Update docs.
> > 	* NEWS: Update docs.
> >
> > include/
> >
> > 2021-09-20  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
> >
> > 	* opcode/aarch64.h (AARCH64_FEATURE_V9): New define.
> > 	(AARCH64_ARCH_V9): New define.
> 
> Approved  - please apply.

Thank you.

commit d5007f0280d881a8add44e6a68a3f536e138244c

> Cheers
>    Nick
>