mlxsw: spectrum: Change ipv6 unregistered mc table

Point back the unregister IPv6 mc table to the bc table.
It is done since IPv6 mcast snooping is not supported for Spectrum yet.
Reported-by: NJiri Pirko <jiri@mellanox.com>
Fixes: 71c365bd ("mlxsw: spectrum: Separate bc and mc floods")
Signed-off-by: NNogah Frankel <nogahf@mellanox.com>
Signed-off-by: NYotam Gigi <yotamg@mellanox.com>
Tested-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -3078,7 +3078,6 @@ static int __mlxsw_sp_flood_init(struct mlxsw_core *mlxsw_core,
 		flood_table = MLXSW_SP_FLOOD_TABLE_UC;
 		break;
 	case MLXSW_REG_SFGC_TYPE_UNREGISTERED_MULTICAST_IPV4:
-	case MLXSW_REG_SFGC_TYPE_UNREGISTERED_MULTICAST_IPV6:
 		flood_table = MLXSW_SP_FLOOD_TABLE_MC;
 		break;
 	default: