pico-imx6ul: Add DFU support

DFU is a convenient way to program U-boot binary into the eMMC.

Add support for it.

Signed-off-by: Vanessa Maegima <vanessa.maegima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/configs/pico-imx6ul_defconfig b/configs/pico-imx6ul_defconfig
index ab9c9f1..e202159 100644
--- a/configs/pico-imx6ul_defconfig
+++ b/configs/pico-imx6ul_defconfig
@@ -10,6 +10,7 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_DFU=y
 CONFIG_CMD_USB_MASS_STORAGE=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_DHCP=y
@@ -21,4 +22,11 @@
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_USB=y
+CONFIG_USB_GADGET=y
+CONFIG_CI_UDC=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_G_DNL_MANUFACTURER="FSL"
+CONFIG_G_DNL_VENDOR_NUM=0x0525
+CONFIG_G_DNL_PRODUCT_NUM=0xa4a5
 CONFIG_OF_LIBFDT=y