[flashrom] [PATCH] AMIC A25LxxPx

[Daniel Lenski]

This patch adds the following chips, all untested, based on the AMIC
datasheets:
    http://www.amictechnology.com/pdf/A25L20P.pdf covers:
    	AMIC A25L05PT
    	AMIC A25L05PU
    	AMIC A25L10PT
    	AMIC A25L10PU
    	AMIC A25L20PT
    	AMIC A25L20PU
    http://www.amictechnology.com/pdf/A25L16P.pdf covers:
    	AMIC A25L16PT
    	AMIC A25L16PU

In comments, it also clarifies the situation surrounding the A25L40PT
and A25L40PU chips, which share the same RDID values, despite the fact
that their erase block layouts are different.  Rudolf Marek tested and
confirmed the distinct erase block layouts of these chips, so I also
marked them as TEST_OK_PREW.

Finally, it adds a pretty-printer for the AMIC SPI chips, and a generic
AMIC chip type.

Signed-off-by: Daniel Lenski