ipq40xx: fix USB on Aruba AP-303H
Enable USB 3.0 controller, disable USB 2.0 controller.
The USB 2.0 port on the AP-303H is actually connected to the USB 3.0
controller's HS phy. Enable the HS phy only, since the SS lanes are not
brought out to the connector.
Signed-off-by: Ryan Salsbury <[email protected]>