Add some inventory item interfaces

This commit adds some inventory item interfaces
that represent:

-- Operator Panels
-- Connectors
-- Voltage Regulators
-- Disk backplanes.

Signed-off-by: Santosh Puranik <santosh.puranik@in.ibm.com>
Change-Id: I5b1bd316209946582b42d1096229d6daf25463c1
diff --git a/xyz/openbmc_project/Inventory/Item/Panel.interface.yaml b/xyz/openbmc_project/Inventory/Item/Panel.interface.yaml
new file mode 100644
index 0000000..a886d99
--- /dev/null
+++ b/xyz/openbmc_project/Inventory/Item/Panel.interface.yaml
@@ -0,0 +1,7 @@
+description: >
+    Implement to provide Panel FRU attributes. A panel
+    is typically found on the chassis of a system and can
+    be used to physically control the system and/or display
+    system status.
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4