[FS#78] Netgear R7800 - problem USB ports

[LEDE Bugs]

The following task has a new comment added:

FS#78 - Netgear R7800 - problem USB ports 
User who did this - Maxim (lobyte)

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sys/class/gpio/usb0 and usb1 - exist
cat /sys/kernel/debug/gpio
gpio15 : out 0 2mA pull down
gpio16 : out 0 2mA pull down
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=78#comment254