wdctrl_read
val = wdctrl_read(sc);
val = wdctrl_read(sc);
val = wdctrl_read(sc);
device_printf(dev, "wd ctrl = %#04x\n", wdctrl_read(sc));
if (wdctrl_read(sc) & AMDSB_WD_DISABLE) {
val = wdctrl_read(sc);