[FS#1190] NETGEAR WNDR3800 USB LED trigger not work properly！

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Daniel Kang (s10123) 

Attached to Project - LEDE Project
Summary - NETGEAR WNDR3800 USB LED trigger not work properly！
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - When I plug USB device in USB port， USB is working。I can copy data to usb device. The USB LED show green。But when the data is copying to usb device, the usb led do not blink, just is always green. I select usb trigger and select usbport hub1 and port1. It does not blink too. It means trigger dont work.

model: NETGEAR WNDR3800 
Firmware Version	LEDE Reboot SNAPSHOT r5420-332438b / LuCI Master (git-17.328.04231-802d5b6) 
Kernel Version	4.9.63

By the way, my device work properly in 15.05.1 and 14.07. When I flash LEGE, it have been found this problem.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1190