staging: comedi: aio_iiro_16: fix subdevice 1 'type'

Subdevice 1 is a digial input not a digital I/O subdevice.

Fix the type and, for aesthetics, rename the (*insn_bits) function used
to read the inputs.
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/aio_iiro_16.c

@@ -55,7 +55,7 @@ static int aio_iiro_16_do_insn_bits(struct comedi_device *dev,
 	return insn->n;
 }
 
-static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
+static int aio_iiro_16_di_insn_bits(struct comedi_device *dev,
 				    struct comedi_subdevice *s,
 				    struct comedi_insn *insn,
 				    unsigned int *data)
@@ -90,12 +90,12 @@ static int aio_iiro_16_attach(struct comedi_device *dev,
 	s->insn_bits = aio_iiro_16_do_insn_bits;
 
 	s = &dev->subdevices[1];
-	s->type = COMEDI_SUBD_DIO;
+	s->type = COMEDI_SUBD_DI;
 	s->subdev_flags = SDF_READABLE;
 	s->n_chan = 16;
 	s->maxdata = 1;
 	s->range_table = &range_digital;
-	s->insn_bits = aio_iiro_16_dio_insn_bits_read;
+	s->insn_bits = aio_iiro_16_di_insn_bits;
 
 	return 0;
 }