pre-upload: accept shorter coreboot Konfig descriptions

New configuration item descriptions of 2 lines long should be
acceptable for coreboot targets.

BUG=None
TEST=prepared a coreboot patch with a 2 line config item description.
     It was failing before this change, and is succeeding after.

Change-Id: Ibd8fbd720bbc095e19f4b56eff71b6ad8e81e962
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/215731
Reviewed-by: David James <davidjames@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
diff --git a/pre-upload.py b/pre-upload.py
index 9e6214c..f6ba150 100755
--- a/pre-upload.py
+++ b/pre-upload.py
@@ -843,6 +843,7 @@
 def _run_checkpatch_coreboot(project, commit):
   """Runs checkpatch with options for coreboot."""
   return _run_checkpatch(project, commit, [
+      '--min-conf-desc-length=2',
       '--no-tree',
       '--ignore=NEW_TYPEDEFS,PREFER_PACKED,PREFER_PRINTF,PREFER_ALIGNED,'
       'GLOBAL_INITIALISERS,INITIALISED_STATIC'])