media controller: add EXPERIMENTAL to Kconfig option for DVB support

The Media Controller DVB support is still an experimental feature,
as it is under heavy development. It is already said that it is
an experimental feature at the help, but let make it even clearer
and louder, as we may need to adjust some bits when we start using it
on embedded drivers.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/Kconfig

@@ -95,7 +95,7 @@ config MEDIA_CONTROLLER
 	  This API is mostly used by camera interfaces in embedded platforms.
 
 config MEDIA_CONTROLLER_DVB
-	bool "Enable Media controller for DVB"
+	bool "Enable Media controller for DVB (EXPERIMENTAL)"
 	depends on MEDIA_CONTROLLER
 	---help---
 	  Enable the media controller API support for DVB.