[M] Change in flashrom[master]: sb600spi.c: Move promontory code into a mmap_read=yes mode

[Arthur Heymans (Code Review)]

Hello build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/71565

to look at the new patch set (#2).

Change subject: sb600spi.c: Move promontory code into a mmap_read=yes mode
......................................................................

sb600spi.c: Move promontory code into a mmap_read=yes mode

The only reason promontory code is handled differently is because memory
mapped reads can be faster than manual SPI sequencing. This is not
hardware specific so move it to an option 'mmap_read=yes'.

Tested on an amd picasso and genoa board.

Change-Id: I13eb5a646d3569170b3911ae7b3127cd3e6022aa
Signed-off-by: Arthur Heymans 
---
M flashrom.8.tmpl
M sb600spi.c
2 files changed, 71 insertions(+), 21 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/65/71565/2