net: dsa: only check presence of link property

When parsing a port, simply use of_property_read_bool which checks the
presence of a given property, instead of parsing the link phandle.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dsa/dsa2.c

@@ -590,8 +590,8 @@ static int dsa_dst_parse(struct dsa_switch_tree *dst)
 static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
 {
 	struct device_node *ethernet = of_parse_phandle(dn, "ethernet", 0);
-	struct device_node *link = of_parse_phandle(dn, "link", 0);
 	const char *name = of_get_property(dn, "label", NULL);
+	bool link = of_property_read_bool(dn, "link");
 
 	if (ethernet) {
 		struct net_device *master;