PCI_LATENCY_TIMER
latency = pci_conf_read(tag, PCI_LATENCY_TIMER);
pci_conf_write(tag, PCI_LATENCY_TIMER, latency<<8);
latency = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_LATENCY_TIMER);
PCI_LATENCY_TIMER, latency<<8);
latency = pci_read_config(dev, PCI_LATENCY_TIMER, 4);
pci_write_config(dev, PCI_LATENCY_TIMER, latency<<8, 4);
#ifndef PCI_LATENCY_TIMER