Document DSA tagged and VLAN based switch configuration by showcases.
Signed-off-by: NBenedikt Spranger <b.spranger@linutronix.de>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>