DataSync: Added the "SyncStatus" property and Enum

- This property is used to define the full Synchronization status of
the BMC.
- This property can take values: "Unknown" and "FullSyncCompleted".

Change-Id: Ifedc8a6767db4d199b7dd00de77dd4e566346623
Signed-off-by: Harsh Agarwal <[email protected]>

yaml/xyz/openbmc_project/DataSync/BMCData.interface.yaml

@@ -22,6 +22,28 @@ properties:
           retries. However, it will not proceed if this property value is set to
           true.
 
+    - name: SyncStatus
+      type: enum[self.SyncStatus]
+      default: Unknown
+      description: >
+          This property represents the current status of the full synchronization
+          process.
+
+enumerations:
+    - name: SyncStatus
+      description: >
+          Defines the current Synchronization status of the BMC.
+      values:
+          - name: Unknown
+            description: >
+                The synchronization status is not yet determined or is
+                in an indeterminate state.
+
+          - name: FullSyncCompleted
+            description: >
+                The full Sync of all the configured files and directory based on 
+                role is completed.
+
 paths:
     - namespace: /xyz/openbmc_project/data_sync/bmc_data
       description: >