lspci: Replace unsigned long long type by u64 and %llx format by PCI_U64_FMT_X

lspci: Replace unsigned long long type by u64 and %llx format by PCI_U64_FMT_X

pciutils already provides and uses u64 type together with PCI_U64_FMT_X
format macro for printing hex value of this type. So use u64 and
PCI_U64_FMT_X also on other few remaining places.

This change fixes printing hexadecimal 64-bit numbers by lspci on Window
systems independently of used compiler (MinGW or MSVC).