[PATCH] commands: exit on invalid option

[Sascha Hauer]

On Mon, Sep 12, 2016 at 12:20:56PM +0200, Enrico Jorns wrote:
> Barebox commands should not perform any action and return 0 if an
> invalid parameter was given. This might cause undetected unintended
> behvaior when calling commands with wrong options, either manually or
> from a script.
> 
> Signed-off-by: Enrico Jorns <ejo at pengutronix.de>

Applied, thanks

Sascha

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