[U-Boot] [PATCH] README: add cmd directory description

[Simon Glass]

On 26 August 2016 at 05:54, Ziyuan Xu <xzy.xu at rock-chips.com> wrote:
> All of the command files have moved to cmd directory, add description to
> Directory Hierarchy.
>
> Signed-off-by: Ziyuan Xu <xzy.xu at rock-chips.com>
> ---
>
>  README | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Simon Glass <sjg at chromium.org>