net: dsa: mv88e6xxx: remove port_fdb_getnext

Now that port_fdb_dump is implemented and even simpler, get rid of
port_fdb_getnext.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 files changed