[FS#901] USB not working on MikroTik hAP ac

[LEDE Bugs]

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

User who did this - Ryan Mounce (rmounce) 

Attached to Project - LEDE Project
Summary - USB not working on MikroTik hAP ac 
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 - Only affecting hAP ac / RB962UiGS-5HacT2HnT

Tested with LEDE trunk in April, no relevant commits to device since.

GPIO to control USB power works, and USB controller appears in dmesg on boot. Upon connecting any device, it is not recognised and there are no kernel messages. Same devices work (albeit via internal hub) on Archer C7 v2 using same SoC.

Bug independently verified by another user, not a hardware defect with a single unit.

I am aware of the irony that I contributed the support for this device, and reported USB as working. I was only looking for the controller to be recognised and neglected to test with an actual USB device until after this was merged. My bad. Logging as a bug so that anyone who finds it not working can at least see a record and know to direct their blame towards me :)

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=901