libertas: fix misuse of netdev_priv() and dev->ml_priv

The mesh and radiotap interfaces need to use the same private data as
the main wifi interface.  If the main wifi interface uses netdev_priv(),
but the other interfaces ->ml_priv, there's no way to figure out where
the private data actually is in the WEXT handlers and netdevice
callbacks.  So make everything use ->ml_priv.

Fixes botched netdev_priv() conversion introduced by "netdevice
libertas: Fix directly reference of netdev->priv", though admittedly
libertas' use of ->priv was somewhat "special".

Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Tested-by: Chris Ball <cjb@laptop.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
index 57f6c12..9014950 100644
--- a/drivers/net/wireless/libertas/scan.c
+++ b/drivers/net/wireless/libertas/scan.c
@@ -945,7 +945,7 @@
 		 union iwreq_data *wrqu, char *extra)
 {
 	DECLARE_SSID_BUF(ssid);
-	struct lbs_private *priv = netdev_priv(dev);
+	struct lbs_private *priv = dev->ml_priv;
 	int ret = 0;
 
 	lbs_deb_enter(LBS_DEB_WEXT);
@@ -1008,7 +1008,7 @@
 		 struct iw_point *dwrq, char *extra)
 {
 #define SCAN_ITEM_SIZE 128
-	struct lbs_private *priv = netdev_priv(dev);
+	struct lbs_private *priv = dev->ml_priv;
 	int err = 0;
 	char *ev = extra;
 	char *stop = ev + dwrq->length;