staging: comedi (adv_pci1723): coding style, fix whitespace before quoted newline

Small fix in adv_pci1723.c for a "whitespace before quoted newline" warning
from checkpatch.pl

Signed-off-by: Matt Billenstein <matt@vazor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/adv_pci1723.c

@@ -234,7 +234,7 @@ static int pci1723_insn_read_ao(struct comedi_device *dev,
 	int n, chan;
 
 	chan = CR_CHAN(insn->chanspec);
-	DPRINTK(" adv_PCI1723 DEBUG: pci1723_insn_read_ao() ----- \n");
+	DPRINTK(" adv_PCI1723 DEBUG: pci1723_insn_read_ao() -----\n");
 	for (n = 0; n < insn->n; n++)
 		data[n] = devpriv->ao_data[chan];