lspci: Fix unsynchronized caches in lspci struct device and pci struct pci_dev

lspci: Fix unsynchronized caches in lspci struct device and pci struct pci_dev

lspci initializes both caches for the device to the same memory block in
its scan_device function. Latter calls to config_fetch function will
realloc cache in struct device, but not in struct pci_dev leading to
the invalid pointer in the latter. pci_dev cache is used by pci_read_*
functions, what will lead to a possible use-after-free situations.

Example:

With patch: