staging: comedi: dt9812: use comedi provided range_unipolar2_5

Remove the private ranges, dt9812_2pt5_a{in,out}_range, in this
driver and use the comedi provided range_unipolar2_5 instead.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/dt9812.c

@@ -303,16 +303,6 @@ struct slot_dt9812 {
 	struct comedi_dt9812 *comedi;
 };
 
-static const struct comedi_lrange dt9812_2pt5_ain_range = { 1, {
-								UNI_RANGE(2.5),
-								}
-};
-
-static const struct comedi_lrange dt9812_2pt5_aout_range = { 1, {
-								 UNI_RANGE(2.5),
-								 }
-};
-
 static struct slot_dt9812 dt9812[DT9812_NUM_SLOTS];
 
 static inline struct usb_dt9812 *to_dt9812_dev(struct kref *d)
@@ -907,7 +897,7 @@ static int dt9812_comedi_open(struct comedi_device *dev)
 			break;
 		case 1:{
 				s->maxdata = 4095;
-				s->range_table = &dt9812_2pt5_ain_range;
+				s->range_table = &range_unipolar2_5;
 			}
 			break;
 		}
@@ -922,7 +912,7 @@ static int dt9812_comedi_open(struct comedi_device *dev)
 			break;
 		case 1:{
 				s->maxdata = 4095;
-				s->range_table = &dt9812_2pt5_aout_range;
+				s->range_table = &range_unipolar2_5;
 			}
 			break;
 		}