nanopc-t4: Enable USB Gadget

Enable DWC3 core, gadget for nanopc-t4 board.

This would help to use fastboot by default.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/nanopc-t4-rk3399_defconfig b/configs/nanopc-t4-rk3399_defconfig
index be91e27..6fef7e6 100644
--- a/configs/nanopc-t4-rk3399_defconfig
+++ b/configs/nanopc-t4-rk3399_defconfig
@@ -50,7 +50,10 @@
 CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_DWC3=y
+CONFIG_ROCKCHIP_USB2_PHY=y
 CONFIG_USB_KEYBOARD=y
+CONFIG_USB_GADGET=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_USB_ETHER_ASIX88179=y