[U-Boot] [U-Boot,2/3] ARM: add RK3399 Ficus board

[Philipp Tomsich]

> This commit adds support for RK3399 Ficus board,
> aka ROCK960 Enterprise Edition.
> 
> Following peripherals are tested and known to work:
> * Gigabit Ethernet
> * USB 2.0
> * MMC
> 
> Signed-off-by: Ezequiel Garcia <ezequiel at collabora.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
>  arch/arm/dts/Makefile            |   1 +
>  arch/arm/dts/rk3399-ficus.dts    | 564 +++++++++++++++++++++++++++++++
>  board/rockchip/evb_rk3399/README |   2 +
>  configs/ficus-rk3399_defconfig   |  71 ++++
>  4 files changed, 638 insertions(+)
>  create mode 100644 arch/arm/dts/rk3399-ficus.dts
>  create mode 100644 configs/ficus-rk3399_defconfig
> 

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