ntb_spad_write
int ntb_spad_write(device_t ntb, unsigned int idx, uint32_t val);
DEVMETHOD(ntb_spad_write, amd_ntb_spad_write),
DEVMETHOD(ntb_spad_write, intel_ntb_spad_write),
DEVMETHOD(ntb_spad_write, ntb_plx_spad_write),
ntb_spad_write(nt->dev, NTBT_WATCHDOG_SPAD, 0);
return ntb_spad_write(tc->dev, sidx, bits);