[SerialICE] Porting to new boards

[Myles Watson]

> > All boot tested.
> >
> Cool! just curious, so what was it?

This function gets called twice.

+	smsc_enable_serial(SUPERIO_CONFIG_PORT, LPC47B397_RT,
SUPERIO_GPIO_IO_BASE);
...
+	smsc_enable_serial(SUPERIO_CONFIG_PORT, LPC47B397_SP1,
CONFIG_SERIAL_PORT);

I didn't notice that, and figured I was done after the call to
enable_serial.  It should probably be renamed to enable_func or something,
but it's working now.

Thanks,
Myles