net: switchdev: remove dev from switchdev_obj cb

The net_device associated to a dump operation does not have to be passed
to the callback. switchdev stores it in a superset struct, if needed.

Also some drivers (such as DSA drivers) may not have easy access to it.

This will simplify pushing the callback function down to the drivers.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 18207878..9ef7c56 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -66,7 +66,7 @@
 
 struct switchdev_obj {
 	enum switchdev_obj_id id;
-	int (*cb)(struct net_device *dev, struct switchdev_obj *obj);
+	int (*cb)(struct switchdev_obj *obj);
 	union {
 		struct switchdev_obj_vlan {		/* PORT_VLAN */
 			u16 flags;