[PATCH v2 1/2] config/arm: strict use of -mcpu for supported CPUs

[Wathsala Wathawana Vithanage]

> > Hi Thomas,
> >
> > CI is failing because gcc version 11 does not enable crypto extension
> > for thunderx2, with -mcpu=thunderx2t99 unless +crypto feature modifier is
> used.
> > Goal of this patch is to drop use of such feature modifiers when an
> > -mcpu is available for a given platform.
> > This issue is fixed in gcc version 13 for thunderx2t99.
> 
> We cannot afford dropping the support of GCC 11.
> Which solution do you propose?
> 
Adding a pseudo mcpu for thunderx2t99 as described in the patch. I will send a v3
with that change.