V4L/DVB (12549): v4l2: video device: Add FM TX controls default configurations

This patch adds basic configurations for FM TX extended controls.
That includes controls names, menu strings, pointer identification,
type classification and flags configuration.

Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>