[U-Boot] [U-Boot, v5, 12/30] env: Convert CONFIG_ENV_IS_IN... to a choice

[Tom Rini]

On Thu, Aug 03, 2017 at 12:21:59PM -0600, Simon Glass wrote:

> At present we support multiple environment drivers but there is not way to
> select between them at run time. Also settings related to the position and
> size of the environment area are global (i.e. apply to all locations).
> 
> Until these limitations are removed we cannot really support more than one
> environment location. Adjust the location to be a choice so that only one
> can be selected. By default the environment is 'nowhere', meaning that the
> environment exists only in memory and cannot be saved.
> 
> Also expand the help for the 'nowhere' option and move it to the top since
> it is the default.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

After some changes to migrate all of the imply ENV_... to default
ENV_... if ... statements, applied to u-boot/master, thanks!

-- 
Tom
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