Adds the DSA API for bridge configuration (flooding, L2 learning,
and aging) offload as found in Linux 5.12 so that we can implement
it in our drivver.
Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
