Enable submit-in-pre-cq for mistral kernel.

BUG=None
TEST=None

Change-Id: Ifdb9eef65801b8b0e684a00fde60d6d0d025a9c4
Reviewed-on: https://chromium-review.googlesource.com/c/1345449
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
Tested-by: SANTHOSH JANARDHANA HASSAN <sahassan@google.com>
diff --git a/COMMIT-QUEUE.ini b/COMMIT-QUEUE.ini
index 1fa62cc..b12665e 100644
--- a/COMMIT-QUEUE.ini
+++ b/COMMIT-QUEUE.ini
@@ -8,3 +8,7 @@
 [GENERAL]
 
 pre-cq-configs: grunt-pre-cq
+
+# This repository isn't used by the CQ at all, so we can submit in the
+# pre-cq.
+submit-in-pre-cq: yes