staging: comedi: daqboard2000: Remove function db2k_initialize_dac()

Remove function db2k_initialize_dac as all it does is call
db2k_dac_disarm.
Modify call site accordingly.
Issue found with Coccinelle.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190725052359.2308-1-nishkadg.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/daqboard2000.c

@@ -665,11 +665,6 @@ static void db2k_initialize_adc(struct comedi_device *dev)
 	db2k_initialize_tmrs(dev);
 }
 
-static void db2k_initialize_dac(struct comedi_device *dev)
-{
-	db2k_dac_disarm(dev);
-}
-
 static int db2k_8255_cb(struct comedi_device *dev, int dir, int port, int data,
 			unsigned long iobase)
 {
@@ -719,7 +714,7 @@ static int db2k_auto_attach(struct comedi_device *dev, unsigned long context)
 		return result;
 
 	db2k_initialize_adc(dev);
-	db2k_initialize_dac(dev);
+	db2k_dac_disarm(dev);
 
 	s = &dev->subdevices[0];
 	/* ai subdevice */