[media] media: report if a pad is sink or source at debug msg

Sometimes, it is important to see if the created pad is
sink or source. Add info to track that.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
1 file changed