Merge branch 'net-systemport-Unmap-queues-upon-DSA-unregister-event'

Florian Fainelli says:

====================
net: systemport: Unmap queues upon DSA unregister event

This patch series fixes the unbinding/binding of the bcm_sf2 switch
driver along with bcmsysport which monitors the switch port queues.
Because the driver was not processing the DSA_PORT_UNREGISTER event, we
would not be unmapping switch port/queues, which could cause incorrect
decisions to be made by the HW (e.g: queue always back-pressured).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>