[coreboot] v3 \r\n

[Myles Watson]

Is there any time when we really want \r\n?

I found some \r in halt and catch fire that seemed on purpose, but all of
the \r\n locations seem to be mistakes (they are mixed with \n in the same
file.)

It seems like a trivial patch to remove them all so that we're consistent,
but If there's a good reason for them ...

Thanks,
Myles