wifi: ath12k: refactor ath12k_mac_op_flush()

To support single wiphy abstraction, introduce link/radio specific helper
function in the mac80211 callback flush(). This way, the callback can be
extended to handle multiple link/radio in the future.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240103063731.3356060-10-quic_periyasa@quicinc.com

drivers/net/wireless/ath/ath12k/mac.c

@@ -6644,15 +6644,10 @@ static int ath12k_mac_op_set_frag_threshold(struct ieee80211_hw *hw, u32 value)
 	return -EOPNOTSUPP;
 }
 
-static void ath12k_mac_op_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-				u32 queues, bool drop)
+static void ath12k_mac_flush(struct ath12k *ar)
 {
-	struct ath12k *ar = hw->priv;
 	long time_left;
 
-	if (drop)
-		return;
-
 	time_left = wait_event_timeout(ar->dp.tx_empty_waitq,
 				       (atomic_read(&ar->dp.num_tx_pending) == 0),
 				       ATH12K_FLUSH_TIMEOUT);
@@ -6667,6 +6662,17 @@ static void ath12k_mac_op_flush(struct ieee80211_hw *hw, struct ieee80211_vif *v
 			    time_left);
 }
 
+static void ath12k_mac_op_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+				u32 queues, bool drop)
+{
+	struct ath12k *ar = hw->priv;
+
+	if (drop)
+		return;
+
+	ath12k_mac_flush(ar);
+}
+
 static int
 ath12k_mac_bitrate_mask_num_ht_rates(struct ath12k *ar,
 				     enum nl80211_band band,