Add EC source code to pre-upload checks

The EC code base should follow Linux kernel coding style.

BUG=None
TEST="repo upload" a non-conform patch and see the warnings

Change-Id: Ifbacd574d0e0f485279a989188c9821e1fd2cdf7
Reviewed-on: https://gerrit.chromium.org/gerrit/12595
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
diff --git a/pre-upload.py b/pre-upload.py
index 2548572..13408e5 100644
--- a/pre-upload.py
+++ b/pre-upload.py
@@ -350,6 +350,7 @@
     "chromiumos/third_party/kernel-next": [_run_checkpatch],
     "chromiumos/third_party/u-boot": [_run_checkpatch_no_tree],
     "chromiumos/platform/u-boot-vboot-integration": [_run_checkpatch_no_tree],
+    "chromeos/vendor/ec-internal/blizzard": [_run_checkpatch_no_tree],
     "chromeos/autotest-tools": [_run_json_check],
 }