V4L/DVB (11075): au0828: make register debug lines easier to read

Make it a little easier to read the debug messages for register read/write
operations

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>