[M] Change in coreboot[main]: 3rdparty/open-power-signing-utils: add SecureBoot utility for OpenPOWER

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Arthur Heymans, Elyes Haouas, Michał Żygowski, Sergii Dmytruk.

Hello Elyes Haouas, Krystian Hebel, Martin L Roth, Michał Żygowski, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/67065?usp=email

to look at the new patch set (#39).

The following approvals got outdated and were removed:
Code-Review+1 by Elyes Haouas, Verified+1 by build bot (Jenkins)

Change subject: 3rdparty/open-power-signing-utils: add SecureBoot utility for OpenPOWER
......................................................................

3rdparty/open-power-signing-utils: add SecureBoot utility for OpenPOWER

Signing is performed with test keys by default, set
CONFIG_SIGNING_KEYS_DIR to non-empty value to use other keys.

Change-Id: Id88baef5ecb1f8ffd74a7f464bbbaaaea0ca643d
Signed-off-by: Michał Żygowski 
Signed-off-by: Sergii Dmytruk 
---
M .gitmodules
A 3rdparty/open-power-signing-utils
M Makefile.mk
M src/soc/ibm/power9/Kconfig
M src/soc/ibm/power9/Makefile.mk
5 files changed, 51 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/65/67065/39