mac80211: add HT support for mesh

This is a quick patch to enable HT for mesh mode
https://github.com/cozybit/open80211s/wiki/HOWTO#high-throughput
http://lists.open80211s.org/pipermail/devel/2012-March/002990.html

For my test setup the speed increased from 1-2 Mbytes/sec to 8-10 Mbytes/sec (iperf)

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>

SVN-Revision: 36639

package/mac80211/files/lib/wifi/mac80211.sh

@@ -411,7 +411,12 @@ enable_mac80211() {
 			# We attempt to set the channel for all interfaces, although
 			# mac80211 may not support it or the driver might not yet
 			# for ap mode this is handled by hostapd
-			[ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
+			config_get htmode "$device" htmode
+			case "$htmode" in
+				HT20|HT40+|HT40-) ;;
+				*) htmode= ;;
+			esac
+			[ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel" $htmode
 		fi
 
 		i=$(($i + 1))