sunxi: Enable USB gadget support for Sinlinx SinA33

Sinlinx SinA33 has a USB OTG port, but VBUS is controlled manually from
a jumper pad.

Enable OTG in gadget mode, as well as the download gadget and related
functions.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

configs/Sinlinx_SinA33_defconfig

@@ -4,10 +4,18 @@ CONFIG_MACH_SUN8I_A33=y
 CONFIG_DRAM_CLK=552
 CONFIG_DRAM_ZQ=15291
 CONFIG_MMC0_CD_PIN="PB4"
+CONFIG_USB0_ID_DET="PH8"
 CONFIG_DEFAULT_DEVICE_TREE="sun8i-a33-sinlinx-sina33"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_DFU=y
 # CONFIG_CMD_FPGA is not set
 CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_MUSB_GADGET=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_G_DNL_MANUFACTURER="Allwinner Technology"
+CONFIG_G_DNL_VENDOR_NUM=0x1f3a
+CONFIG_G_DNL_PRODUCT_NUM=0x1010