Change in coreboot[master]: util/inteltool: add lockdown mode detection

[Eloy (Code Review)]

Attention is currently required from: Eloy, Stefan Reinauer.
Hello build bot (Jenkins), Stefan Reinauer,

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

https://review.coreboot.org/c/coreboot/+/63702

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

Change subject: util/inteltool: add lockdown mode detection
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util/inteltool: add lockdown mode detection

This commit fixes https://github.com/zamaudio/intelmetool/issues/20, because lockdown mode in the kernel blocks privileged I/O operations. When lockdown mode is used, this commit makes the error message less confusing when inteltool is ran with root permissions

Change-Id: I9914fe392d53be390924e60dbfb16d3c9d222f44
Signed-off-by: Eloy Degen 
---
M util/inteltool/inteltool.c
1 file changed, 49 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/02/63702/3