[PATCH] doc: move firmware instructions in mlx5 guide

[Dariusz Sosnowski]

On Mon, Jun 08, 2026 at 02:05:31PM +0200, Thomas Monjalon wrote:
> Having firmware update instructions before firmware config
> looks simpler to find than in compilation prerequisites.
> 
> A link is also added after listing minimum firmware versions.
> 
> Signed-off-by: Thomas Monjalon <thomas at monjalon.net>

Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>