Update README how to contribute

Change-Id: I69d0acf67327424809397f5fcf236b99bc980d71
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -245,6 +245,13 @@
 The contributions will be code reviewed by Arm before they can be accepted into
 the repository.
 
+In order to submit a contribution push your patch to
+`ssh://<GITHUB_USER_ID>@review.mlplatform.org:29418/ml/ethos-u/ethos-u-linux-driver-stack`.
+To do this you will need to sign-in to
+[review.mlplatform.org](https://review.mlplatform.org) using a GitHub account
+and add your SSH key under your settings. If there is a problem adding the SSH
+key make sure there is a valid email address in the Email Addresses field.
+
 # Security
 
 Please see [Security](SECURITY.md).