mac80211: fix ht capabilities for HT20

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

SVN-Revision: 40776

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

@@ -148,7 +148,8 @@ mac80211_hostapd_setup_base() {
 			RX-STBC123:0x300:0x300:1 \
 			DSSS_CCK-40:0x1000::$dsss_cck_40
 
-		[ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab$ht_capab_flags" "$N"
+		ht_capab="$ht_capab$ht_capab_flags"
+		[ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
 	}
 
 	# 802.11ac