ARM: imx: vining2000: Enable fitImage support

The fitImage support was enabled in the downstream U-Boot port and the
kernel images on the device are fitImage, yet this functionality is not
enabled in mainline U-Boot. Enable it.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Silvio Fricke <silvio.fricke@softing.com>
Cc: Stefano Babic <sbabic@denx.de>

configs/vining_2000_defconfig

@@ -16,6 +16,8 @@ CONFIG_SPL=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_SPL_TEXT_BASE=0x00908000
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/softing/vining_2000/imximage.cfg"
 CONFIG_BOOTDELAY=0
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y