bonding: use kobject_put instead of _del after kobject_add

Otherwise the name of the kobject isn't getting freed and other stuff from
kobject_cleanup() isn't getting called. kobject_put() will call
kobject_del() on its own in kobject_cleanup().

CC: Jay Vosburgh <[e-mail]>
CC: Andy Gospodarek <[e-mail]>
Signed-off-by: Veaceslav Falico <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/bonding/bond_sysfs_slave.c

···
 	for (a = slave_attrs; *a; ++a) {
 		err = sysfs_create_file(&slave->kobj, &((*a)->attr));
 		if (err) {
-			kobject_del(&slave->kobj);
+			kobject_put(&slave->kobj);
 			return err;
 		}
 	}
···
 	for (a = slave_attrs; *a; ++a)
 		sysfs_remove_file(&slave->kobj, &((*a)->attr));
 
-	kobject_del(&slave->kobj);
+	kobject_put(&slave->kobj);
 }