This change updates the USB configuration for the RK3399-Q7 in the DTS:
* fixes the OTG board configuration by enabling it ('okay')
* improves the speed of 'usb start' by disabling the unused EHCI/OHCI
controllers
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>