[U-Boot] [U-Boot, 2/2] config: evb-rk3399: enable make uboot.itb

[Philipp Tomsich]

> Similar to firefly 3399 enable the ability to create a FIT image
> with combined arm-trusted-firmware.
> 
> Signed-off-by: Peter Robinson <pbrobinson at gmail.com>
> ---
>  configs/evb-rk3399_defconfig | 3 +++
>  1 file changed, 3 insertions(+)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>