pio_send_control
pio_send_control(dd, PSC_GLOBAL_VLARB_ENABLE);
pio_send_control(dd, PSC_DATA_VL_DISABLE);
pio_send_control(dd, PSC_DATA_VL_ENABLE);
pio_send_control(dd, PSC_CM_RESET);
pio_send_control(dd, PSC_GLOBAL_DISABLE);
pio_send_control(dd, PSC_GLOBAL_DISABLE);
pio_send_control(dd, PSC_GLOBAL_ENABLE);
void pio_send_control(struct hfi1_devdata *dd, int op);