Merge branch 'br-fdb-refactoring'

Vladimir Oltean says:

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Bridge FDB refactoring

This series refactors the br_fdb.c, br_switchdev.c and switchdev.c files
to offer the same level of functionality with a bit less code, and to
clarify the purpose of some functions.

No functional change intended.
====================

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