staging: comedi: addi_apci_3xxx: tidy up analog input subdevice init

For aesthetic reasnons, add some whitespace to the analog input
subdevice initialization.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi_apci_3xxx.c

@@ -597,7 +597,7 @@ static int apci3xxx_auto_attach(struct comedi_device *dev,
 	if (ret)
 		return ret;
 
-	/*  Allocate and Initialise AI Subdevice Structures */
+	/* Analog Input subdevice */
 	s = &dev->subdevices[0];
 	if (board->ai_n_chan) {
 		dev->read_subdev = s;