PCIER_DEVICE_CTL
burst = CSR_READ_2(sc, base + PCIER_DEVICE_CTL);
sc->bge_expcap + PCIER_DEVICE_CTL, 2);
pci_write_config(dev, sc->bge_expcap + PCIER_DEVICE_CTL,
burst = pci_read_config(dev, i + PCIER_DEVICE_CTL, 2);
#define PCIR_EXPRESS_DEVICE_CTL PCIER_DEVICE_CTL