rockchip: config: popmetal: enable the USB host controller and function

RK3288 using the dwc2 USB host controller, enable it and other usb host
funtion like storage and ether.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Added rockchip: tag:
Signed-off-by: Simon Glass <sjg@chromium.org>