media: vicodec: Fix error codes in probe function

If these functions fail then we return success, but we should instead
preserve negative error code and return that.

Fixes: fde649b4 ("media: vicodec: Register another node for stateless decoder")
Fixes: c022a4a9 ("media: vicodec: add struct for encoder/decoder instance")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>