staging: comedi: cb_das16_cs: use the BIP_RANGE helper macro

The BIP_RANGE(a) macro can be used instead of the RANGE(a,b)
macro when -a == b. And it's a bit clearer that this is a bipolar
range.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_das16_cs.c

@@ -90,12 +90,13 @@ struct das16cs_private {
 
 static struct pcmcia_device *cur_dev;
 
-static const struct comedi_lrange das16cs_ai_range = { 4, {
-							   RANGE(-10, 10),
-							   RANGE(-5, 5),
-							   RANGE(-2.5, 2.5),
-							   RANGE(-1.25, 1.25),
-							   }
+static const struct comedi_lrange das16cs_ai_range = {
+	4, {
+		BIP_RANGE(10),
+		BIP_RANGE(5),
+		BIP_RANGE(2.5),
+		BIP_RANGE(1.25),
+	}
 };
 
 static irqreturn_t das16cs_interrupt(int irq, void *d)