wifi: rtw89: coex: Set Bluetooth background scan PTA request priority

When Wi-Fi is RX, set Bluetooth background scan to low-priority and
not to break Wi-Fi packet. Bluetooth can RX depend on hardware ability
even RX request has been rejected. This way can improve Wi-Fi RX
throughput performance.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230117114109.4298-6-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/coex.c

@@ -4763,6 +4763,8 @@ void _run_coex(struct rtw89_dev *rtwdev, enum btc_reason_and_action reason)
 		_action_wl_nc(rtwdev);
 		break;
 	case BTC_WLINK_2G_STA:
+		if (wl->status.map.traffic_dir & BIT(RTW89_TFC_DL))
+			bt->scan_rx_low_pri = true;
 		_action_wl_2g_sta(rtwdev);
 		break;
 	case BTC_WLINK_2G_AP: