rockchip: rk3288: enable rockusb support on rk3288 based device

this patch enable rockusb support on rk3288 based device.

Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/rock2_defconfig b/configs/rock2_defconfig
index c76a0b9..43dce46 100644
--- a/configs/rock2_defconfig
+++ b/configs/rock2_defconfig
@@ -20,6 +20,7 @@
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_TIME=y
@@ -70,6 +71,8 @@
 CONFIG_USB_GADGET_VENDOR_NUM=0x2207
 CONFIG_USB_GADGET_PRODUCT_NUM=0x320a
 CONFIG_USB_GADGET_DWC2_OTG=y
+CONFIG_USB_DWC2=y
+CONFIG_USB_STORAGE=y
 CONFIG_DM_VIDEO=y
 CONFIG_DISPLAY=y
 CONFIG_VIDEO_ROCKCHIP=y
@@ -78,3 +81,8 @@
 CONFIG_USE_TINY_PRINTF=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_ERRNO_STR=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_USB_GADGET_VBUS_DRAW=0
+CONFIG_G_DNL_MANUFACTURER="Rockchip"
+CONFIG_G_DNL_VENDOR_NUM=0x2207
+CONFIG_G_DNL_PRODUCT_NUM=0x320a