base-files: fix LED IDE trigger

This changes the ide-disk LED trigger to the generic disk-activity as
ide-disk trigger was removed in upstream commit eb25cb9956cc ("leds:
convert IDE trigger to common disk trigger").

Signed-off-by: Thomas Albers <thomas.gameiro@googlemail.com>
[split into separate commit, commit description facelift]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/base-files/files/lib/functions/uci-defaults.sh

@@ -404,7 +404,7 @@ ucidef_set_led_gpio() {
 }
 
 ucidef_set_led_ide() {
-	_ucidef_set_led_trigger "$1" "$2" "$3" ide-disk
+	_ucidef_set_led_trigger "$1" "$2" "$3" disk-activity
 }
 
 ucidef_set_led_netdev() {