mac80211: only add the mbssid option to the config when set

This avoids errors when the feature is not built into the hostapd binary

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh

@@ -488,7 +488,7 @@ ${channel:+channel=$channel}
 ${channel_list:+chanlist=$channel_list}
 ${hostapd_noscan:+noscan=1}
 ${tx_burst:+tx_queue_data2_burst=$tx_burst}
-mbssid=$multiple_bssid
+${multiple_bssid:+mbssid=$multiple_bssid}
 #num_global_macaddr=$num_global_macaddr
 $base_cfg
 
@@ -537,7 +537,7 @@ mac80211_generate_mac() {
 	local phy="$1"
 	local id="${macidx:-0}"
 
-	wdev_tool "$phy" get_macaddr id=$id num_global=$num_global_macaddr mbssid=$multiple_bssid
+	wdev_tool "$phy" get_macaddr id=$id num_global=$num_global_macaddr mbssid=${multiple_bssid:-0}
 }
 
 get_board_phy_name() (
@@ -1049,7 +1049,7 @@ drv_mac80211_setup() {
 		txpower \
 		rxantenna txantenna \
 		frag rts beacon_int:100 htmode \
-		num_global_macaddr:1 multiple_bssid:0
+		num_global_macaddr:1 multiple_bssid
 	json_get_values basic_rate_list basic_rate
 	json_get_values scan_list scan_list
 	json_select ..