[U-Boot] tools/env: allow equal sign as key value separation

[Tom Rini]

On Thu, Mar 01, 2018 at 02:06:32PM +0100, Stefan Agner wrote:

> From: Stefan Agner <stefan.agner at toradex.com>
> 
> Treat the first equal sign as a key/value separation too. This makes
> the script files compatible with mkenvimage input file format. It
> won't support variables with equal signs anymore, but this seems not
> really like a loss.
> 
> Signed-off-by: Stefan Agner <stefan.agner at toradex.com>

Applied to u-boot/master, thanks!

-- 
Tom
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