Re: [flashrom] [PATCH] serprog SPI support

[Urja Rannikko]

Add SPI support to serprog protocol.

Signed-off-by: Urja Rannikko 
---
Changed stuff mostly according to review ... and an e-mail that
arrived while I was writing this.
Added the optimized SPI read function for serprog that I had already
done, -r time for 1Mbyte 18s -> 11s.
> the other opbuf stuff should also be optional imho, but if this is done
> we probably would like to change the functions using it because they
> often bail out via exit if they read a NAK e.g. sp_flush_stream

Now it is mandatory for non-SPI, but optional for SPi.
If the programmer is SPI-only we should not get any other than delay
calls that would generate opbuf-using commands,
will test for this later and report.