[S] Change in flashrom[master]: tests: ensure chip erase operation is executed

[Nikolai Artemiev (Code Review)]

Attention is currently required from: Nikolai Artemiev.

Hello build bot (Jenkins), Edward O'Callaghan, Angel Pons, Anastasia Klimchuk,

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

https://review.coreboot.org/c/flashrom/+/69130

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

Change subject: tests: ensure chip erase operation is executed
......................................................................

tests: ensure chip erase operation is executed

The `full_chip_erase_with_wp_dummyflasher_test_success` test case
checks that erasing a write-protected region of a dummyflasher chip
fails.

However erase optimization may cause the erase operation to be skipped
if the flash contents are already erased, so the erase operation appears
to succeed and the test case fails.

Writing a non-erased value to the chip ensures that an erase operation
will be executed and (hopefully) fail due to write protection.

BUG=b:237620197
BRANCH=none
TEST=ninja test

Change-Id: Ia00444dcd2ad96c64832a13201efbd064cd7302d
Signed-off-by: Nikolai Artemiev 
---
M include/flash.h
M tests/chip_wp.c
2 files changed, 35 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/30/69130/2