[PATCH] build: move AVX512 check to x86 config

[Bruce Richardson]

On Fri, Aug 11, 2023 at 03:10:24PM +0200, David Marchand wrote:
> The AVX512 check only matters to x86 compilation with gcc.
> Move it where appropriate.
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---
Acked-by: Bruce Richardson <bruce.richardson at intel.com>