mt76: use macro for sn and seq_ctrl conversion

Use macro to convert sn and seq_ctrl for better readability.
Signed-off-by: Roy Luo <royluo@google.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/agg-rx.c

@@ -135,7 +135,7 @@ mt76_rx_aggr_check_ctl(struct sk_buff *skb, struct sk_buff_head *frames)
 		return;
 
 	status->tid = le16_to_cpu(bar->control) >> 12;
-	seqno = le16_to_cpu(bar->start_seq_num) >> 4;
+	seqno = IEEE80211_SEQ_TO_SN(le16_to_cpu(bar->start_seq_num));
 	tid = rcu_dereference(wcid->aggr[status->tid]);
 	if (!tid)
 		return;

drivers/net/wireless/mediatek/mt76/mt7603/mac.c

@@ -590,7 +590,7 @@ mt7603_mac_fill_rx(struct mt7603_dev *dev, struct sk_buff *skb)
 	status->aggr = unicast &&
 		       !ieee80211_is_qos_nullfunc(hdr->frame_control);
 	status->tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
-	status->seqno = hdr->seq_ctrl >> 4;
+	status->seqno = IEEE80211_SEQ_TO_SN(hdr->seq_ctrl);
 
 	return 0;
 }

drivers/net/wireless/mediatek/mt76/mt7603/main.c

@@ -593,7 +593,7 @@ mt7603_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		mt7603_mac_tx_ba_reset(dev, msta->wcid.idx, tid, -1);
 		break;
 	case IEEE80211_AMPDU_TX_START:
-		mtxq->agg_ssn = *ssn << 4;
+		mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(*ssn);
 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 		break;
 	case IEEE80211_AMPDU_TX_STOP_CONT:

drivers/net/wireless/mediatek/mt76/mt76x02_util.c

@@ -378,7 +378,7 @@ int mt76x02_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		ieee80211_send_bar(vif, sta->addr, tid, mtxq->agg_ssn);
 		break;
 	case IEEE80211_AMPDU_TX_START:
-		mtxq->agg_ssn = *ssn << 4;
+		mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(*ssn);
 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 		break;
 	case IEEE80211_AMPDU_TX_STOP_CONT: