bridge: Distinguish between externally learned vs offloaded FDBs

Distinguish between externally learned vs offloaded FDBs. This is done
in order to indicate that FDBs added by software was successfully
offloaded.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
2 files changed