Add d-bus interfaces for Settings

Resolves openbmc/openbmc#1486.

Change-Id: I377f40516a6a0317bb4b5d811704288048c83cc8
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/xyz/openbmc_project/Control/Security/RestrictionMode.interface.yaml b/xyz/openbmc_project/Control/Security/RestrictionMode.interface.yaml
new file mode 100644
index 0000000..8e4fd8d
--- /dev/null
+++ b/xyz/openbmc_project/Control/Security/RestrictionMode.interface.yaml
@@ -0,0 +1,23 @@
+description: >
+    Implement to specify a restricted mode of operation.
+
+properties:
+    - name: RestrictionMode
+      type: enum[self.Modes]
+      description: >
+          The restriction mode.
+
+enumerations:
+    - name: Modes
+      description: >
+        Possible modes of restriction.
+      values:
+        - name: None
+          description: >
+            No restriction.
+        - name: Whitelist
+          description: >
+            Allow, only if in the whitelist.
+        - name: Blacklist
+          description: >
+            Prevent, if in the blacklist.