staging: comedi: rtd520: remove RtdDacRange macro

This macro uses the 'devpriv' macro which relies on a local variable
having a specific name. Plus it's just a wrapper around a simple
'writew'. Remove the macro.
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/rtd520.c

@@ -406,11 +406,6 @@ struct rtdPrivate {
 
 /* Macros to access registers */
 
-/* Set DAC output type and range */
-#define RtdDacRange(dev, n, v) \
-	writew((v) & 7, devpriv->las0 \
-		+(((n) == 0) ? LAS0_DAC1_CTRL : LAS0_DAC2_CTRL))
-
 /* Reset DAC FIFO */
 #define RtdDacClearFifo(dev, n) \
 	writel(0, devpriv->las0+(((n) == 0) ? LAS0_DAC1_RESET : \
@@ -1538,7 +1533,8 @@ static int rtd_ao_winsn(struct comedi_device *dev,
 	int range = CR_RANGE(insn->chanspec);
 
 	/* Configure the output range (table index matches the range values) */
-	RtdDacRange(dev, chan, range);
+	writew(range & 7, devpriv->las0 +
+		((chan == 0) ? LAS0_DAC1_CTRL : LAS0_DAC2_CTRL));
 
 	/* Writing a list of values to an AO channel is probably not
 	 * very useful, but that's how the interface is defined. */