batman-adv: make the AP isolation attribute VLAN specific

AP isolation has to be enabled on one VLAN interface only.
This patch moves the AP isolation attribute to the per-vlan
interface attribute set, enabling it to have a different
value depending on the selected vlan.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh
index dfdea2b..0baa657 100644
--- a/Documentation/ABI/testing/sysfs-class-net-mesh
+++ b/Documentation/ABI/testing/sysfs-class-net-mesh
@@ -6,13 +6,14 @@
                 Indicates whether the batman protocol messages of the
                 mesh <mesh_iface> shall be aggregated or not.
 
-What:           /sys/class/net/<mesh_iface>/mesh/ap_isolation
+What:           /sys/class/net/<mesh_iface>/mesh/<vlan_subdir>/ap_isolation
 Date:           May 2011
 Contact:        Antonio Quartulli <antonio@meshcoding.com>
 Description:
                 Indicates whether the data traffic going from a
                 wireless client to another wireless client will be
-                silently dropped.
+                silently dropped. <vlan_subdir> is empty when referring
+		to the untagged lan.
 
 What:           /sys/class/net/<mesh_iface>/mesh/bonding
 Date:           June 2010