staging: comedi: das08: No need to check insn->n for counter config

There is no need to check the value of `insn->n` is correct in
`das08_counter_config()` as the core comedi module will have already
checked it.

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

drivers/staging/comedi/drivers/das08.c

@@ -466,9 +466,6 @@ static int das08_counter_config(struct comedi_device *dev,
 	unsigned long i8254_iobase = dev->iobase + thisboard->i8254_offset;
 	int chan = insn->chanspec;
 
-	if (insn->n != 2)
-		return -EINVAL;
-
 	switch (data[0]) {
 	case INSN_CONFIG_SET_COUNTER_MODE:
 		i8254_set_mode(i8254_iobase, 0, chan, data[1]);