gadget: rockchip: Add rk3399 USB_GADGET_PRODUCT_NUM

Add 0x330c for rk3399 gadget product number.
Tested-by: NLevin Du <djw@t-chip.com.cn>
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

drivers/usb/gadget/Kconfig

@@ -62,6 +62,7 @@ config USB_GADGET_PRODUCT_NUM
 	default 0x310c if ROCKCHIP_RK3128
 	default 0x320a if ROCKCHIP_RK3229 || ROCKCHIP_RK3288
 	default 0x330a if ROCKCHIP_RK3328
+	default 0x330c if ROCKCHIP_RK3399
 	default 0x0
 	help
 	  Product ID of the USB device emulated, reported to the host device.