media: zoran: remove proc_fs

The zoran driver give some debug information in procfs, but this is not
the right place.
So let's remove them, we will use debugfs later.

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