base-files: reset LED state

Attempt to reset all LED states before applying the UCI configuration to
avoid leaving disabled LEDs behind in lingering glowing state, e.g. when
changing the sysfs entry in the config from one hardware LED to another.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/base-files/files/etc/init.d/led

@@ -103,6 +103,12 @@ load_led() {
 
 start() {
 	[ -e /sys/class/leds/ ] && {
+		local led
+		for led in /sys/class/leds/*; do
+			[ -e "$led/trigger" ] && echo "none" > "$led/trigger"
+			[ -e "$led/brightness" ] && echo "0" > "$led/brightness"
+		done
+
 		config_load system
 		config_foreach load_led led
 	}