openpower-vpd-parser: srcrev bump 31d50fa794..bf78ed8883

Priyanga Ramasamy (1):
      Set presence for embedded non-synthesized frus

Santosh Puranik (6):
      Fix PCIe device check
      PEL: Check Presence Before Error Logging
      Do not collect VPD unless required
      Update Asset Tag On Factory Resets
      manager: Sync AssetTag Property
      vpd-manager: Fix compile failure.

Change-Id: I1d9c55f770d1923a00f8c80a6a4587b777c86633
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>