Merge branch 'lan9303-Add-basic-offloading-of-unicast-traffic'

Egil Hjelmeland says:

====================
lan9303: Add basic offloading of unicast traffic

This series add basic offloading of unicast traffic to the lan9303
DSA driver.

Review welcome!

Changes v1 -> v2:
 - Patch 1: Codestyle linting.
 - Patch 2: Remember SWE_PORT_STATE while not bridged.
            Added constant LAN9303_SWE_PORT_MIRROR_DISABLED.
====================

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