[DTC] small ftdump cleanup patch

[Paul Gortmaker]

Jon Loeliger wrote:
> So, like, the other day Paul Gortmaker mumbled:
>   
>> Here is a small patch to clean up the usage info and the error returns
>> for ftdump -- not sure what the future holds for ftdump vs. simply using
>> "dtc -I dtb -O dts someblob.dtb" ...
>>
>> Paul.
>>     
>
> Paul,
>
> Any chance of a signed-off-by line?
>   

Sure,  here is the whole thing.

Paul.


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