inventory.decorator: define CLEI interface

Some products, especially in the telecom space, have an assigned
CLEI number.  See https://tools.ietf.org/html/rfc4152 .  Define
an interface to store the CLEI.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8a3499a4e76b0605414ce702a76c01e126536dca
diff --git a/xyz/openbmc_project/Inventory/Decorator/CLEI.interface.yaml b/xyz/openbmc_project/Inventory/Decorator/CLEI.interface.yaml
new file mode 100644
index 0000000..9647bd9
--- /dev/null
+++ b/xyz/openbmc_project/Inventory/Decorator/CLEI.interface.yaml
@@ -0,0 +1,9 @@
+description: >
+    Implement to indicate an item with a defined Common Language Equipment
+    Identifer (CLEI) number.
+
+properties:
+    - name: CLEINumber
+      type: string
+      description: >
+          The CLEI number of the inventory item.