ntb_spad_count
uint8_t ntb_spad_count(device_t ntb);
DEVMETHOD(ntb_spad_count, amd_ntb_spad_count),
DEVMETHOD(ntb_spad_count, intel_ntb_spad_count),
DEVMETHOD(ntb_spad_count, ntb_plx_spad_count),
spad_count = ntb_spad_count(dev);
tc->inspad_cnt = ntb_spad_count(tc->dev);
tc->peers[pidx].outspad_cnt = ntb_spad_count(tc->dev);