[U-Boot] [PATCH v4 07/13] Add standard environment variables README

[Jason Hobbs]

On Tue, Aug 23, 2011 at 05:45:07PM -0400, Mike Frysinger wrote:
> this somewhat duplicates the "Environment Variables" section in the top level 
> README.  can't we have just one location for this stuff ?

Ah, you're right. When I searched for existing doc before adding this
file, I didn't think to look outside of the doc dir.

I will move this doc into README.

Jason