pci_set_powerstate
.set_powerstate = pci_set_powerstate,
status_t pci_set_powerstate(uchar virtualBus, uint8 device,
pci_set_powerstate(pa, PCI_PMCSR_STATE_D0);
pci_set_powerstate(pa->pa_pc, pa->pa_tag, PCI_PMCSR_STATE_D0);
int pci_set_powerstate(device_t dev, int newPowerState);
pci_set_powerstate(dev, PCI_POWERSTATE_D0);