[U-Boot] [U-Boot, v4, 4/4] doc: rockchip: Add phyCORE-RK3288 RDK to board list

[Philipp Tomsich]

> Signed-off-by: Wadim Egorov <w.egorov at phytec.de>
> Acked-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> Changes in v4:
> - Added Reviewed-by: Simon Glass <sjg at chromium.org>
> 
>  doc/README.rockchip | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

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