Correct a maybe-typo in pci_manager

the variable 'dev' in set_hvdevs are only used for list comprehension,
it does not make sense to use 'dev' again for updating self.stale.

Change-Id: I03f31bfcfc56a43e43eb88845e1d562f19a3a09e
Merge "Correct a maybe-typo in pci_manager"