set_channel
callbacks.set_channel(client);
rf->set_channel = zyd_rfmd_set_channel;
rf->set_channel = zyd_al2230_set_channel;
rf->set_channel = zyd_al7230B_set_channel;
rf->set_channel = zyd_al2210_set_channel;
rf->set_channel = zyd_gct_set_channel;
rf->set_channel = zyd_maxim_set_channel;
rf->set_channel = zyd_maxim2_set_channel;
(*rf->set_channel)(rf, chan);
int (*set_channel)(struct zyd_rf *, uint8_t);