Moving to correct PCIe Device interface

Move PCIe device interface to
"xyz.openbmc_project.Inventory.Item.PCIeDevice".

peci-pcie commit:
https://gerrit.openbmc.org/c/openbmc/peci-pcie/+/62100



Tested: Validator passed

Change-Id: Ica6f4ca37bf9adca18bedc69422ff05f0c7d73f2
Signed-off-by: Lakshmi Yadlapati <lakshmiy@us.ibm.com>