docs: netdev: shorten the name and mention msgid for patch status

Cut down the length of the question so it renders better in docs.
Mention that Message-ID can be used to search patchwork.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>