Add .gitreview

To support "git review" command.

Change-Id: Iaeb4f4c73b97c2a801de245a2c3f4fc2eeadba9b
Signed-off-by: Chris Brand <chris.brand@cypress.com>
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..8e94b2a
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=review.trustedfirmware.org
+port=29418
+project=TF-M/tf-m-tools
+defaultbranch=main