mac80211: set IEEE80211_TX_CTL_FIRST_FRAGMENT for beacons

Also simplify the flags assignment into a single statement at the
end of ieee80211_beacon_get_tim.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index f3841f4..680bcb7 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2251,8 +2251,9 @@
 
 	info->control.vif = vif;
 
-	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
-	info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
+	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
+			IEEE80211_TX_CTL_ASSIGN_SEQ |
+			IEEE80211_TX_CTL_FIRST_FRAGMENT;
  out:
 	rcu_read_unlock();
 	return skb;