[U-Boot] gpt: support random UUIDs without setting environment variables

[Tom Rini]

On Mon, Jan 26, 2015 at 09:44:18AM -0600, Rob Herring wrote:

> Currently, an environment variable must be used to store the randomly
> generated UUID for each partition. This is not necessary, so make storing
> the UUID optional. Now passing uuid_disk and uuid are optional when random
> UUIDs are enabled.
> 
> Signed-off-by: Rob Herring <robh at kernel.org>
> Acked-by: Przemyslaw Marczak <p.marczak at samsung.com>

Applied to u-boot/master, thanks!

-- 
Tom
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