bridge: call netdev_sw_port_stp_update when bridge port STP status changes

bridge: call netdev_sw_port_stp_update when bridge port STP status changes

To notify switch driver of change in STP state of bridge port, add new
.ndo op and provide switchdev wrapper func to call ndo op. Use it in bridge
code then.

Signed-off-by: Scott Feldman <[email protected]>
Signed-off-by: Jiri Pirko <[email protected]>
Signed-off-by: Andy Gospodarek <[email protected]>
Acked-by: Thomas Graf <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>