net: sparx5: Add handling of host MDB entries

Handle adding and removing MDB entries for host

Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Link: https://lore.kernel.org/r/20220503093922.1630804-1-casper.casan@gmail.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>