pci: Remove error reporting from PCI VPD parsing

pci: Remove error reporting from PCI VPD parsing

The PCI VPD (Vital Product Data) may be missing or the kernel can report
presence but not actually have the data. Also the data is specified by
the device vendor and thus may be invalid in some cases.

To avoid log spamming, since the only usage in the node device driver is
ignoring errors, remove all error reporting.

Closes: https://gitlab.com/libvirt/libvirt/-/issues/607
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>