ntb_peer_spad_read
int ntb_peer_spad_read(device_t ntb, unsigned int idx, uint32_t *val);
DEVMETHOD(ntb_peer_spad_read, amd_ntb_peer_spad_read),
DEVMETHOD(ntb_peer_spad_read, intel_ntb_peer_spad_read),
DEVMETHOD(ntb_peer_spad_read, ntb_plx_peer_spad_read),
rc = ntb_peer_spad_read(tc->dev, sidx, &bits);