mac80211: implement the distance setting

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19142 3c298f89-4303-0410-b956-a3cf2f4a3e73

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

@@ -77,6 +77,7 @@ enable_mac80211() {
 	config_get vifs "$device" vifs
 	config_get txpower "$device" txpower
 	config_get country "$device" country
+	config_get distance "$device" distance
 	find_mac80211_phy "$device" || return 0
 	config_get phy "$device" phy
 	local i=0
@@ -87,6 +88,8 @@ enable_mac80211() {
 		fixed=1
 	}
 
+	[ -n "$distance" ] && iw phy "$phy" set distance "$distance"
+
 	export channel fixed
 	# convert channel to frequency
 	local freq="$(get_freq "$phy" "${fixed:+$channel}")"