[PATCH] libertas: remove adapter->beaconperiod

beaconperiod was initialized with MRVDRV_BEACON_INTERVAL, but there is
no code that would ever change it's value. We can use the define directly.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/dev.h

@@ -265,7 +265,6 @@ struct _wlan_adapter {
 	u8 scantype;
 	u32 scanmode;
 
-	u16 beaconperiod;
 	u8 adhoccreate;
 
 	/** capability Info used in Association, start, join */

drivers/net/wireless/libertas/join.c

@@ -496,7 +496,7 @@ int libertas_cmd_80211_ad_hoc_start(wlan_private * priv,
 	/* set the BSS type */
 	adhs->bsstype = CMD_BSS_TYPE_IBSS;
 	adapter->mode = IW_MODE_ADHOC;
-	adhs->beaconperiod = cpu_to_le16(adapter->beaconperiod);
+	adhs->beaconperiod = cpu_to_le16(MRVDRV_BEACON_INTERVAL);
 
 	/* set Physical param set */
 #define DS_PARA_IE_ID   3

drivers/net/wireless/libertas/main.c

@@ -1043,8 +1043,6 @@ static void wlan_init_adapter(wlan_private * priv)
 	adapter->auto_rate = 1;
 	adapter->cur_rate = 0;
 
-	adapter->beaconperiod = MRVDRV_BEACON_INTERVAL;
-
 	// set default capabilities
 	adapter->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;