Merge branch 'dsa-isolation-prep'

Vladimir Oltean says:

====================
DSA preparations for FDB isolation between bridges

This series makes 2 small changes to DSA's SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE
handler, which will make it possible to offer switch drivers a stable
association between a FDB entry and a bridge device in a future series.
====================

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