[U-Boot] [PATCH 3/3] x86: Mention running U-Boot in 64-bit mode in the README

[Bin Meng]

On Mon, Jul 18, 2016 at 9:27 AM, Bin Meng <bmeng.cn at gmail.com> wrote:
> On Sun, Jul 17, 2016 at 3:23 PM, Simon Glass <sjg at chromium.org> wrote:
>> This feature is not supported. Document this, and add some details on how it
>> might be implemented.
>>
>> Signed-off-by: Simon Glass <sjg at chromium.org>
>> ---
>>
>>  doc/README.x86 | 18 ++++++++++++++++++
>>  1 file changed, 18 insertions(+)
>>
>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

applied to u-boot-x86, thanks!