fbnic: Push local unicast MAC addresses to FW to populate TCAMs

The MACDA TCAM can only be accessed by one entity at a time and as such we
cannot have simultaneous reads from the firmware to probe for changes from
the host. As such we have to send a message indicating what the state of
the MACDA is to the firmware when we updated it so that the firmware can
sync up the TCAMs it owns to route BMC packets to the host.

To support that we are adding a new message that is invoked when we write
the MACDA that will notify the firmware of updates from the host and allow
it to sync up the TCAM configuration to match the one on the host side.

Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/175623750782.2246365.9178255870985916357.stgit@ahduyck-xeon-server.home.arpa
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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