pci: Make PCI API consistent wrt using struct pci_dev

Complete conversion of PCI API so all functions
that imply the underlying device does exist would
use struct pci_dev as a handle, not pcidevaddr_t.

Cc: Thomas Huth <thuth@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>