Staging: comedi: fix printk issue in contec_pci_dio.c

This is a patch to the contec_pci_dio.c file that fixes up a
printk warning found by the checkpatch.pl tool.

Converted printks to dev_dbg().

Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --cc drivers/staging/comedi/drivers/contec_pci_dio.c
Simple merge