This is a patch to the das6402.c file that fixes up a printk
warning found by the checkpatch.pl tool.

Converted printks to dev_version.
Removed unnecessary printk statements.
Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>