configs: rockchip: rk3399: Khadas Edge add USB OHCI

Problem: USB2.0 port can recognize any USB1.1 devices (like usb keyboard)
Add missed USB OHCI configuration

USB device tree:
  1  Hub (480 Mb/s, 0mA)
     u-boot EHCI Host Controller

  1  Hub (12 Mb/s, 0mA)
  |   U-Boot Root Hub
  |
  +-2  Human Interface (1.5 Mb/s, 100mA)
        Dell KB216 Wired Keyboard

Signed-off-by: Artem Lapkin <art@khadas.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>