[M] Change in flashrom[master]: flashrom.c: Supplement `chip->unlock()` calls with wp unlocking

[Nikolai Artemiev (Code Review)]

Attention is currently required from: Edward O'Callaghan, Nikolai Artemiev.

Nikolai Artemiev has uploaded a new patch set (#13) to the change originally created by Edward O'Callaghan. ( https://review.coreboot.org/c/flashrom/+/69517 )

Change subject: flashrom.c: Supplement `chip->unlock()` calls with wp unlocking
......................................................................

flashrom.c: Supplement `chip->unlock()` calls with wp unlocking

The full writeprotect implementation has proper support and
ability to unlock flash over spi25_statusreg.c. Therefore if
the required bits are available for the given chip prefer
proper writeprotect support instead of adhoc spi25_statusreg.c
helpers.

BUG=b:237485865
BRANCH=none
TEST=Tested on grunt DUT (prog: sb600spi, flash: W25Q128.W):
     `flashrom --wp-range 0x0,0x1000000 \
      flashrom --wp-status     # Result: range=0x0,0x1000000 \
      flashrom -w random.bin   # Result: success \
      flashrom -v random.bin   # Result: success \
      flashrom --wp-status     # Result: range=0x0,0x1000000`
TEST=Tested that chips without WP support can still be unlocked
     by deleting decode_range for W25Q128.W flashchip and
     retesting on the grunt DUT.

Change-Id: I74b3f5d3a17749ea60485b916b2d87467a5d8b2f
CoAuthored-by: Nikolai Artemiev 
Signed-off-by: Nikolai Artemiev 
Signed-off-by: Edward O'Callaghan 
---
M flashrom.c
1 file changed, 86 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/17/69517/13