[media] adv7842: Composite free-run platfrom-data fix

Incorrectly setting of free-run for Composite.
Copy/paste regression fix.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>