schemas: Add Inventory.Item.Storage interface

This commit adds the Item.Storage interface as described in [1].

Support the BSM with the `xyz.openbmc_project.Inventory.Item.Storage`
interface to label the hardware type.

[1] https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/yaml/xyz/openbmc_project/Inventory/Item/Storage.interface.yaml

Change-Id: I0655987262cd13aff32b376f8aa8baeff498afa4
Signed-off-by: Ingrid Chen <ingrid.chen.wiwynn@gmail.com>
diff --git a/configurations/bmc_storage_module.json b/configurations/bmc_storage_module.json
index 4dbfc8f..3162ae5 100644
--- a/configurations/bmc_storage_module.json
+++ b/configurations/bmc_storage_module.json
@@ -21,5 +21,6 @@
         "PartNumber": "$BOARD_PART_NUMBER",
         "SerialNumber": "$BOARD_SERIAL_NUMBER",
         "SparePartNumber": "$BOARD_INFO_AM1"
-    }
+    },
+    "xyz.openbmc_project.Inventory.Item.Storage": {}
 }