staging: comedi: s626: fix the number of dio channels

The first digital i/o subdevice has its n_chan set to S626_DIO_CHANNELS
which is defined as 48. This is actually the total number of channels
provided by all three digital i/o subdevices. Each subdevice only has
16 channels.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/s626.c

@@ -2636,7 +2636,7 @@ static int s626_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	/* digital I/O subdevice */
 	s->type = COMEDI_SUBD_DIO;
 	s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
-	s->n_chan = S626_DIO_CHANNELS;
+	s->n_chan = 16;
 	s->maxdata = 1;
 	s->io_bits = 0xffff;
 	s->private = &dio_private_A;