vendor PCI vendor id to match, or PCI_ANY_ID to match all vendor ids
device PCI device id to match, or PCI_ANY_ID to match all device ids
ss_vendor PCI subsystem vendor id to match, or PCI_ANY_ID to match all vendor ids
ss_device PCI subsystem device id to match, or PCI_ANY_ID to match all device ids
from Previous PCI device found in search, or NULL for new search.
Iterates through the list of known PCI devices. If a PCI device is
found with a matching vendor, device, ss_vendor and ss_device, a pointer to its
device structure is returned. Otherwise, NULL is returned.
A new search is initiated by passing NULL to the from argument.
Otherwise if from is not NULL, searches continue from next device on the global list.