[U-Boot] rockchip: rk3399: set fdtfile

[Philipp Tomsich]

> Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Tested-by: Klaus Goger <klaus.goger at theobroma-systems.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
>  include/configs/rk3399_common.h | 1 +
>  1 file changed, 1 insertion(+)
> 

Applied to u-boot-rockchip, thanks!