DSA ignores SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, so a bridge that
changes its VLAN protocol while switch ports are offloaded keeps them
running the old one without telling the driver. Carry a kernel patch
that adds an optional port_vlan_protocol operation for that attribute;
drivers without it behave as before.
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Quinn O'Shea <qoshea@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/25927
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>