[U-Boot] [RFC 1/2] env: Drop error messages when loading environment

[Wolfgang Denk <wd@denx.de>]

Dear Sam,

In message <20180717220912.11358-1-semen.protsenko@linaro.org> you wrote:
> This is just a draft to discuss ideas related to "Make U-Boot log great
> again" thread.
> 
> With this patch we will have something like this:
> 
>     Loading Environment from FAT... Failed (-5)
>     Loading Environment from MMC... OK
> 
> instead of this:
> 
>     Loading Environment from FAT... MMC: no card present
>     ** Bad device mmc 0 **
>     Failed (-5)
>     Loading Environment from MMC... OK

Why do you think an error message "Failed (-5)" looks great?

From a user's point of view, the "MMC: no card present"
is _much_ better (but of course it could still be improved).

Printing cryptic error codes has never been a good idea and is
definitly not a "great" idea.

Best regards,

Wolfgang Denk

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