[coreboot] flashrom: Remove Makefile pciutils check, and don't rm *~ in clean

[Stefan Reinauer]

Peter Stuge wrote:
> Patch attached.
>
> I have on two occasions in a short period of time run into systems
> where the pciutils check fails, while both packages are in fact
> installed. In one case, no compiler was installed. The other case
> has not been resolved yet, but the fact is that the check is not
> precise enough.
>   
It is very precise. It does not check for a compiler, because having a 
compiler installed for compiling is obvious.
Having those additional packages installed is less obvious.

> It is also a waste of time to do the check on every single make
> invocation.
>   
I disagree with removing this. We started including it because we had so 
many people not reading the readme and complaining about failed compilation.

NACK.

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