psu: Add phosphor-psu-monitor.service

Creating a new service file for the phosphor-psu-monitor application
created by the phosphor-power-supply subdirectory tree.

Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
Change-Id: I2769f6ac0012fe8849ef266930d8c736a88417ce
diff --git a/services/phosphor-psu-monitor.service b/services/phosphor-psu-monitor.service
new file mode 100644
index 0000000..a973a70
--- /dev/null
+++ b/services/phosphor-psu-monitor.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Phosphor Power Supply Monitor
+Wants=obmc-mapper.target
+After=obmc-mapper.target
+Wants=mapper-wait@-org-openbmc-control-power0.service
+After=mapper-wait@-org-openbmc-control-power0.service
+
+[Service]
+Restart=on-failure
+ExecStart=phosphor-psu-monitor
+
+[Install]
+WantedBy=multi-user.target