libertas: remove double assignment of dev->netdev_ops

This came in through the patch titled:
    libertas: first stab at cfg80211 support

I only noticed it because it breaks compat-wireless :)

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Acked-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index e6da1df..87bfd17 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -1276,7 +1276,6 @@
 		goto err_adapter;
 	}
 
-	dev->netdev_ops = &lbs_netdev_ops;
 	dev->ieee80211_ptr = wdev;
 	dev->ml_priv = priv;
 	SET_NETDEV_DEV(dev, dmdev);