[media] DVB: dib0700, remove double \n's from log

err() already adds \n to the end of the format string. So remove one
more \n from formatting strings in the dib0700 driver.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>