[media] tuner-core: properly initialize media controller subdev
[media] tuner-core: properly initialize media controller subdev

Properly initialize tuner core subdev at the media controller.

That requires a new subtype at the media controller API.

Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@osg.samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs