This patch adds bridge support for vsc73xx driver.
It introduce two functions for port_bridge_join and
vsc73xx_port_bridge_leave handling.
Those functions implement forwarding adjust and use
dsa_tag_8021q_bridge_* api for adjust VLAN configuration.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Pawel Dembicki <paweldembicki@xxxxxxxxx>
Reviewed-by: Vladimir Oltean <olteanv@xxxxxxxxx>