Add MCTP service file

Previous service file for this repo are contained
in the corresponding meta layer.
Now move it into the repository that owns them.

Signed-off-by: Xiaochao Ma <maxiaochao@inspur.com>
Change-Id: I15d85815483da19b08869225eb50866b49fe5575
diff --git a/mctp-demux.service b/mctp-demux.service
new file mode 100644
index 0000000..c04a46d
--- /dev/null
+++ b/mctp-demux.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=MCTP demultiplexer daemon
+
+[Service]
+Restart=always
+EnvironmentFile=-/etc/default/mctp
+ExecStart=/usr/bin/mctp-demux-daemon $DEMUX_BINDING_OPTS
+SyslogIdentifier=mctp-demux
+
+[Install]
+WantedBy=multi-user.target