Revert "net: dsa: Implement ndo_get_phys_port_id"

This reverts commit 3a543ef4 ("net: dsa:
Implement ndo_get_phys_port_id") since it misuses the purpose of
ndo_get_phys_port_id(). We have ndo_get_phys_port_name() to do the
correct thing for us now.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/slave.c

@@ -983,15 +983,6 @@ static void dsa_slave_poll_controller(struct net_device *dev)
 }
 #endif
 
-static int dsa_slave_get_phys_port_id(struct net_device *dev,
-				      struct netdev_phys_item_id *ppid)
-{
-	struct dsa_slave_priv *p = netdev_priv(dev);
-
-	ppid->id_len = sizeof(p->port);
-	memcpy(ppid->id, &p->port, ppid->id_len);
-}
-
 static int dsa_slave_get_phys_port_name(struct net_device *dev,
 					char *name, size_t len)
 {
@@ -1050,7 +1041,6 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
 	.ndo_bridge_getlink	= switchdev_port_bridge_getlink,
 	.ndo_bridge_setlink	= switchdev_port_bridge_setlink,
 	.ndo_bridge_dellink	= switchdev_port_bridge_dellink,
-	.ndo_get_phys_port_id	= dsa_slave_get_phys_port_id,
 	.ndo_get_phys_port_name	= dsa_slave_get_phys_port_name,
 };