[coreboot-gerrit] Change in coreboot[master]: doc/mb/hp/z220_sff.md: Add some information

[Ao Zhong (Code Review)]

Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/48010

to look at the new patch set (#3).

Change subject: doc/mb/hp/z220_sff.md: Add some information
......................................................................

doc/mb/hp/z220_sff.md: Add some information

Added some test results about this mainboard and the way to disable
SPI flash write protection.

Signed-off-by: Ao Zhong 
Change-Id: I3ec61557c9c800db66b3b7db78ea6120c109d84a
---
M Documentation/mainboard/hp/z220_sff.md
A Documentation/mainboard/hp/z220_sff_pin1.jpg
A Documentation/mainboard/hp/z220_sff_pin2.jpg
3 files changed, 43 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/48010/3