content: reserve virtio device ID for sdm

VIRTIO-149

Signed-off-by: Christian Pinto <c.pinto@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Message-Id: <1467111824-11548-2-git-send-email-c.pinto@virtualopensystems.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/trunk@582 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652

content.tex

@@ -3018,6 +3018,8 @@ \chapter{Device Types}\label{sec:Device Types}
 \hline
 20         &   Crypto device \\
 \hline
+21         &   Signal Distribution Module \\
+\hline
 \end{tabular}
 
 Some of the devices above are unspecified by this document,