[PATCH] doc: raise an error on warnings for dts

[Thomas Monjalon]

21/01/2026 11:01, David Marchand:
> Similarly to commit 6572fc926037 ("doc: make sphinx comply with ..."),
> pass -W to sphinx to catch warnings.
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>

Acked-by: Thomas Monjalon <thomas at monjalon.net>

Note: "dts" could be uppercased in the title