[XS] Change in em100[main]: em100: return an error if a command fails

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Hello Jakub Czapiga, build bot (Jenkins),

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

https://review.coreboot.org/c/em100/+/80250?usp=email

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

Change subject: em100: return an error if a command fails
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em100: return an error if a command fails

We don't properly return an error in every code path when a command
fails. This makes it hard to use this tool in a shell script because you
can't be sure that your command was successful.

Change-Id: I2554252d007a92e939088389d67f9d4cede837ee
Signed-off-by: Corvin Köhne 
---
M em100.c
1 file changed, 2 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/em100 refs/changes/50/80250/2