[media] media: platform: pxa_camera: make printk consistent

Make all print consistent by always using :
 - dev_xxx(pcdev_to_dev(pcdev), ....)

This prepares the soc_camera adherence removal by making these call rely
on only pcdev, and not the soc_camera icd structure.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>