media: staging: media: zoran: move module parameter checks to zoran_probe

We need to empty zoran_init() for removing it later.
Furthermore, this permit to use pci_xxx instead of pr_xxx for prettier
printing.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>