[RFC 1/3] net: dsa: add cross-chip notification for bridge

When multiple switch chips are chained together, one needs to know about the bridge membership of others. For instance, switches like Marvell 6352 have cross-chip port-based VLAN table to allow or forbid cross-chip frames to egress. Add a cross_chip_bridge DSA driver function, used to notify a

[RFC 1/3] net: dsa: add cross-chip notification for bridge

When multiple switch chips are chained together, one needs to know about the bridge membership of others. For instance, switches like Marvell 6352 have cross-chip port-based VLAN table to allow or forbid cross-chip frames to egress. Add a cross_chip_bridge DSA driver function, used to notify a