Merge branch 'mlxsw-unified-bridge-conversion-part-3'

Ido Schimmel says:

====================
mlxsw: Unified bridge conversion - part 3/6

This is the third part of the conversion of mlxsw to the unified bridge
model.

Like the second part, this patchset does not begin the conversion, but
instead prepares the FID code for it. The individual changes are
relatively small and self-contained with detailed description and
motivation in the commit message.
====================

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