lib/config: Correct a typo

BUG=chromium:1025328
TEST=./run_tests

Change-Id: Icb99b540f6e666c3772e5a6a5722245e44bb832c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1922307
Tested-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Auto-Submit: Dhanya Ganesh <dhanyaganesh@chromium.org>
Reviewed-by: Alex Zamorzaev <zamorzaev@chromium.org>
Commit-Queue: Dhanya Ganesh <dhanyaganesh@chromium.org>
(cherry picked from commit e406b8a0ba1a069c1a5d3f74963a47303c06862a)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1993515
Tested-by: Sean Abraham <seanabraham@chromium.org>
Auto-Submit: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
diff --git a/lib/config_lib.py b/lib/config_lib.py
index d43a222..6c81f21 100644
--- a/lib/config_lib.py
+++ b/lib/config_lib.py
@@ -1904,7 +1904,7 @@
   # We strip those string from the board so that lab can handle it correctly.
   SPECIAL_SUFFIX = [
       '-arcnext$', '-arcvm$', '-kernelnext$', '-kvm$', '-ndktranslation$',
-      '-cfm%', '-campfire$'
+      '-cfm$', '-campfire$'
   ]
   for suffix in SPECIAL_SUFFIX:
     board = re.sub(suffix, '', board)