Inventory: Add Item.Storage D-Bus Interface

Adding Storage interface to organize the Storage resource for Redfish.

Change-Id: I70222fa3d49a975a76629dd15379417904b628c0
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/yaml/xyz/openbmc_project/Inventory/Item/Storage.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item/Storage.interface.yaml
new file mode 100644
index 0000000..bc8fa8d
--- /dev/null
+++ b/yaml/xyz/openbmc_project/Inventory/Item/Storage.interface.yaml
@@ -0,0 +1,2 @@
+description: >
+    Implement to provide storage attributes.