Add SSIF Bridge Daemon

This commit adds SSIF bridge support adapted from BT Bridge (btbridged).
This daemon is standing between BMC SSIF kernel driver and DBUS IPMI
Interface for sending IPMI requests and return responses.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Signed-off-by: Narayan Chavani <nchavani@amperecomputing.com>
Signed-off-by: Chuong Tran <chuong.tran@amperecomputing.com>
Change-Id: Ie445bce125658aafa1cb42e2165439ea3a08ef41
diff --git a/ssifbridge.service b/ssifbridge.service
new file mode 100644
index 0000000..250389a
--- /dev/null
+++ b/ssifbridge.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=SSIF Bridge Daemon
+
+[Service]
+Type=dbus
+BusName=org.openbmc.HostIpmi
+ExecStart=/usr/sbin/ssifbridged
+Restart=on-abort
+
+[Install]
+WantedBy=multi-user.target