libertas: convert adhoc operations to direct commands

with fixes for v9 and later firmware too.

Signed-off-by: Dan Williams <dcbw@redhat.com>
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 dafe62e..2436634 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -295,7 +295,7 @@
 							     priv->curbssparams.bssid,
 							     WLAN_REASON_DEAUTH_LEAVING);
 			else if (priv->mode == IW_MODE_ADHOC)
-				lbs_stop_adhoc_network(priv);
+				lbs_adhoc_stop(priv);
 			lbs_add_rtap(priv);
 		}
 		priv->monitormode = monitor_mode;