[PATCH] libertas: single out mesh code

This patches adds the two functions wlan_add_mesh() and wlan_remove_mesh(),
which are responsible for the mshX interface. In a CF driver with a non-
mesh-aware firmware you can omit the calls to this functions.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/rx.c b/drivers/net/wireless/libertas/rx.c
index 371cbf17..a0779dc 100644
--- a/drivers/net/wireless/libertas/rx.c
+++ b/drivers/net/wireless/libertas/rx.c
@@ -140,7 +140,7 @@
 {
 	lbs_deb_rx("skb->data %p\n", skb->data);
 
-	if(IS_MESH_FRAME(skb))
+	if (priv->mesh_dev && IS_MESH_FRAME(skb))
 		skb->dev = priv->mesh_dev;
 	else
 		skb->dev = priv->wlan_dev.netdev;