4525c0a4c4 cherry-picked check
for the FSF address presence from upstream. However, it has a typo
resulting in this obscure error when triggered:
Use of uninitialized value in concatenation (.) or string at /home/jenkins/.jenkins/jobs/openocd-gerrit/workspace/tools/scripts/checkpatch.pl line 1258.
This patch fixes it.
Signed-off-by: Paul Fertser <email@example.com>
Reviewed-by: Andreas Fritiofson <firstname.lastname@example.org>