net: make dev_get_port_parent_id slightly more readable

Cosmetic commit making dev_get_port_parent_id slightly more readable.
There is no need to split the condition to return after calling
devlink_compat_switch_id_get and after that 'recurse' is always true.
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -9165,14 +9165,11 @@ int dev_get_port_parent_id(struct net_device *dev,
 	}
 
 	err = devlink_compat_switch_id_get(dev, ppid);
-	if (!err || err != -EOPNOTSUPP)
+	if (!recurse || err != -EOPNOTSUPP)
 		return err;
 
-	if (!recurse)
-		return -EOPNOTSUPP;
-
 	netdev_for_each_lower_dev(dev, lower_dev, iter) {
-		err = dev_get_port_parent_id(lower_dev, ppid, recurse);
+		err = dev_get_port_parent_id(lower_dev, ppid, true);
 		if (err)
 			break;
 		if (!first.id_len)