Correct starting seqno.

sta->last_seq_ctrl is the seq_ctrl field from the last
header seen, need to shift it 4 bits to extract the
sequence number.

Change-Id: I8b4d059e87070dff198cea83309e1a1d329d67f7
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 77cd025..1903220 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1171,7 +1171,7 @@
 			mutex_lock(&local->sta_mtx);
 			sta = sta_info_get_bss(sdata, rx_agg->addr);
 			if (sta) {
-				u16 last_seq = sta->last_seq_ctrl[rx_agg->tid];
+				u16 last_seq = le16_to_cpu(sta->last_seq_ctrl[rx_agg->tid]) >> 4;
 
 				__ieee80211_start_rx_ba_session(sta,
 						0, 0,