[U-Boot] [PATCH v2 2/3] config_cmd_default.h: Add 'env exists' command

[Tom Rini]

On Wed, Feb 25, 2015 at 11:23:51PM +0100, Sjoerd Simons wrote:

> env exists allows scripts to query whether an environment variable
> exists. Enable by default as it adds only a trivial amount of code and
> can be useful in scripts.
> 
> Signed-off-by: Sjoerd Simons <sjoerd.simons at collabora.co.uk>
> Reviewed-by: Hans de Goede <hdegoede at redhat.com>

Applied to u-boot/master, thanks!

-- 
Tom
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