pfr-manager: stop pfr-manager service if PFR not supported

Add support to stop the PFR manager service if PFR CPLD not available
and pfr not provisioned.

Tested:
1. When PFR CPLD is available and pfr provisioned.

Command: busctl introspect xyz.openbmc_project.PFR.Manager /xyz/
         openbmc_project/pfr
Response:
NAME                                TYPE   SIGNATURE  RESULT/VALUE FLAGS
xyz.openbmc_project.PFR.Attributes interface  -          -
.UfmLocked                          property  b          false
.UfmProvisioned                     property  b          true
.UfmSupport                         property  b          true

2. When PFR CPLD not available.

PFR service has been stopped.
Command: busctl tree xyz.openbmc_project.PFR.Manager.service
Response: No objects discovered.

CPLD version is displayed.
Command: GET: https://<BMC_IP/redfish/v1/UpdateService/FirmwareInventory
              /cpld_active
Response:
{
    "@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/
                 cpld_active",
    "@odata.type": "#SoftwareInventory.v1_1_0.SoftwareInventory",
    "Description": "Other image",
    "Id": "cpld_active",
    "Name": "Software Inventory",
    "Status": {
        "Health": "OK",
        "HealthRollup": "OK",
        "State": "Enabled"
    },
    "Updateable": false,
    "Version": "0.7"
}

3. When PFR CPLD available and PFR not provisioned.
PFR service has been stopped.
Command: busctl tree xyz.openbmc_project.PFR.Manager.service
Response: No objects discovered.

CPLD version is displayed.
Command: GET: https://<BMC_IP/redfish/v1/UpdateService/FirmwareInventory
              /cpld_active
Response:
{
    "@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/
                  cpld_active",
    "@odata.type": "#SoftwareInventory.v1_1_0.SoftwareInventory",
    "Description": "Other image",
    "Id": "cpld_active",
    "Name": "Software Inventory",
    "Status": {
        "Health": "OK",
        "HealthRollup": "OK",
        "State": "Enabled"
    },
    "Updateable": false,
    "Version": "44.0-2.0-
    508eaac356f28be18791eb6027a663b01dcfbe3101bc2777ccfb9101289b97c5"
}

Signed-off-by: Chalapathi Venkataramashetty <chalapathix.venkataramashetty@intel.com>
Change-Id: I93945033df6f4381923000973e57f346dad87e30
diff --git a/xyz.openbmc_project.PFR.Manager.service b/xyz.openbmc_project.PFR.Manager.service
index d6a1003..2c80d90 100644
--- a/xyz.openbmc_project.PFR.Manager.service
+++ b/xyz.openbmc_project.PFR.Manager.service
@@ -2,9 +2,11 @@
 Description=Daemon manages PFR dbus properties and Event logs
 Wants=rsyslog.service
 After=rsyslog.service
+Requires=xyz.openbmc_project.EntityManager.service
+After=xyz.openbmc_project.EntityManager.service
 
 [Service]
-Restart=always
+Restart=on-failure
 ExecStart=/usr/bin/pfr-manager
 RestartSec=5
 StartLimitInterval=0