Add inventory interfaces for OpenBMC

A first pass at a machine parseable DBus specification for the
inventory features of OpenBMC.

Change-Id: Ia061ab2d5c2ea9d06cd991940303250cef48ab66
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/xyz/openbmc_project/Inventory/Item/PowerSupply.interface.yaml b/xyz/openbmc_project/Inventory/Item/PowerSupply.interface.yaml
new file mode 100644
index 0000000..9cf016c
--- /dev/null
+++ b/xyz/openbmc_project/Inventory/Item/PowerSupply.interface.yaml
@@ -0,0 +1,4 @@
+description: >
+    Implement to provide PowerSupply attributes.
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4