bonding: change name of sysfs dir for bonding slaves

Allow user to identify easily what the attributes are related to. Change
the name of the group to "bonding_slave" to be similar to master which
is named "bonding".
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_sysfs_slave.c

@@ -118,7 +118,7 @@ int bond_sysfs_slave_add(struct slave *slave)
 	int err;
 
 	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
-				   &(slave->dev->dev.kobj), "slave");
+				   &(slave->dev->dev.kobj), "bonding_slave");
 	if (err)
 		return err;