mlxsw: spectrum_router: Simplify a piece of code

Signed-off-by: NPetr Machata <petrm@mellanox.com>
Reviewed-by: NIdo Schimmel <idosch@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_router.c

@@ -3124,9 +3124,7 @@ mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev,
 
 	switch (event) {
 	case NETDEV_UP:
-		if (!rif)
-			return true;
-		return false;
+		return rif == NULL;
 	case NETDEV_DOWN:
 		idev = __in_dev_get_rtnl(dev);
 		if (idev && idev->ifa_list)