wifi: rtl8xxxu: support multiple interface in start_ap()

Call set_bssid() with the correct port_num now.
Signed-off-by: Martin Kaistra <martin.kaistra@linutronix.de>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20231222101442.626837-17-martin.kaistra@linutronix.de

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c

@@ -5111,11 +5111,12 @@ rtl8xxxu_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 static int rtl8xxxu_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			     struct ieee80211_bss_conf *link_conf)
 {
+	struct rtl8xxxu_vif *rtlvif = (struct rtl8xxxu_vif *)vif->drv_priv;
 	struct rtl8xxxu_priv *priv = hw->priv;
 	struct device *dev = &priv->udev->dev;
 
 	dev_dbg(dev, "Start AP mode\n");
-	rtl8xxxu_set_bssid(priv, vif->bss_conf.bssid, 0);
+	rtl8xxxu_set_bssid(priv, vif->bss_conf.bssid, rtlvif->port_num);
 	rtl8xxxu_write16(priv, REG_BCN_INTERVAL, vif->bss_conf.beacon_int);
 	priv->fops->report_connect(priv, RTL8XXXU_BC_MC_MACID, 0, true);