staging: comedi: das08: Unmark some __maybe_unused functions

The `das08jr_di_rbits()`, `das08jr_do_wbits()`, `das08jr_ao_winsn()` and
`das08ao_ao_winsn()` static functions are currently marked as
`__maybe_unused` as they were formerly only referred to by possibly
conditionally compiled out code.  This is no longer the case (they are
referred to by `das08_common_attach()`) so their `__maybe_unused` tags
can be removed.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/das08.c

@@ -342,9 +342,9 @@ static int das08_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
 	return insn->n;
 }
 
-static int __maybe_unused
-das08jr_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
-		 struct comedi_insn *insn, unsigned int *data)
+static int das08jr_di_rbits(struct comedi_device *dev,
+			    struct comedi_subdevice *s,
+			    struct comedi_insn *insn, unsigned int *data)
 {
 	data[0] = 0;
 	data[1] = inb(dev->iobase + DAS08JR_DIO);
@@ -352,9 +352,9 @@ das08jr_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
 	return insn->n;
 }
 
-static int __maybe_unused
-das08jr_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
-		 struct comedi_insn *insn, unsigned int *data)
+static int das08jr_do_wbits(struct comedi_device *dev,
+			    struct comedi_subdevice *s,
+			    struct comedi_insn *insn, unsigned int *data)
 {
 	struct das08_private_struct *devpriv = dev->private;
 
@@ -369,9 +369,9 @@ das08jr_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
 	return insn->n;
 }
 
-static int __maybe_unused
-das08jr_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
-		 struct comedi_insn *insn, unsigned int *data)
+static int das08jr_ao_winsn(struct comedi_device *dev,
+			    struct comedi_subdevice *s,
+			    struct comedi_insn *insn, unsigned int *data)
 {
 	int n;
 	int lsb, msb;
@@ -399,9 +399,9 @@ das08jr_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
  * a different method to force an update.
  *
  */
-static int __maybe_unused
-das08ao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
-		 struct comedi_insn *insn, unsigned int *data)
+static int das08ao_ao_winsn(struct comedi_device *dev,
+			    struct comedi_subdevice *s,
+			    struct comedi_insn *insn, unsigned int *data)
 {
 	int n;
 	int lsb, msb;