bonding: do vlan cleanup

Now when all devices are cleaned up, bond can be cleaned up as well

- remove bond->vlgrp
- remove bond_vlan_rx_register
- substitute necessary occurences of vlan_group_get_device

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 2df9276..7f8b20a3 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -635,7 +635,7 @@
 			client_info->ntt = 0;
 		}
 
-		if (bond->vlgrp) {
+		if (bond_vlan_used(bond)) {
 			if (!vlan_get_tag(skb, &client_info->vlan_id))
 				client_info->tag = 1;
 		}
@@ -847,7 +847,7 @@
 		skb->priority = TC_PRIO_CONTROL;
 		skb->dev = slave->dev;
 
-		if (bond->vlgrp) {
+		if (bond_vlan_used(bond)) {
 			struct vlan_entry *vlan;
 
 			vlan = bond_next_vlan(bond,