Inventory: Add type-only inventory interfaces to config files

Added object specific type-only interfaces to the host ipmi and
vpd layout files. Applications can watch on these interfaces
to determine if the interested inventory objects are created.

Change-Id: Ibea36f07a5e3ee75f084e96ce1e45b3e5766e414
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
diff --git a/common/recipes-phosphor/vpd/openpower-fru-vpd-layout/layout.yaml b/common/recipes-phosphor/vpd/openpower-fru-vpd-layout/layout.yaml
index eb7f827..b920050 100644
--- a/common/recipes-phosphor/vpd/openpower-fru-vpd-layout/layout.yaml
+++ b/common/recipes-phosphor/vpd/openpower-fru-vpd-layout/layout.yaml
@@ -7,9 +7,9 @@
         VINI,DR: PrettyName
     xyz.openbmc_project.Common.UUID:
         OPFR,UD: UUID
-
-
+    xyz.openbmc_project.Inventory.Item.Bmc:
 ETHERNET:
     xyz.openbmc_project.Inventory.Item.NetworkInterface:
         VINI,B1: MACAddress
         OPFR,B1: MACAddress
+    xyz.openbmc_project.Inventory.Item.Ethernet: