wireless: libertas: fix unaligned le64 accesses

use get_unaligned_le64() to get timestamp
Signed-off-by: Steven Miao <realmz6@gmail.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/cfg.c

@@ -634,7 +634,7 @@ static int lbs_ret_scan(struct lbs_private *priv, unsigned long dummy,
 			if (channel &&
 			    !(channel->flags & IEEE80211_CHAN_DISABLED))
 				cfg80211_inform_bss(wiphy, channel,
-					bssid, le64_to_cpu(*(__le64 *)tsfdesc),
+					bssid, get_unaligned_le64(tsfdesc),
 					capa, intvl, ie, ielen,
 					LBS_SCAN_RSSI_TO_MBM(rssi),
 					GFP_KERNEL);