plcomcnattach
plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1);
plcomcnattach(&pi, speed, uart_freq, flags, -1);
int plcomcnattach (struct plcom_instance *, int, int, tcflag_t, int);
if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK,
if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK,