mac80211: disable powersave on the sta by default (for performance reasons)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18379 3c298f89-4303-0410-b956-a3cf2f4a3e73

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

@@ -127,6 +127,9 @@ enable_mac80211() {
 				local wdsflag
 				[ "$wds" -gt 0 ] && wdsflag="wds on"
 				iw phy "$phy" interface add "$ifname" type managed $wdsflag
+				config_get_bool powersave "$vif" powersave 0
+				[ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
+				iwconfig "$ifname" power "$powersave"
 			;;
 		esac