[media] c8sectpfe: use a new Kconfig menu for DVB platform drivers

While this is the first DVB platform drivers, let's keep the
Kconfig options well organized, adding it on its own DVB menu.

Of course, it should depend on MEDIA_DIGITAL_TV_SUPPORT, as
this enables all DVB-related menus.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/Kconfig

@@ -293,4 +293,13 @@ config VIDEO_VIM2M
 	  framework.
 endif #V4L_TEST_DRIVERS
 
+menuconfig DVB_PLATFORM_DRIVERS
+	bool "DVB platform devices"
+	depends on MEDIA_DIGITAL_TV_SUPPORT
+	default n
+	---help---
+	  Say Y here to enable support for platform-specific Digital TV drivers.
+
+if DVB_PLATFORM_DRIVERS
 source "drivers/media/platform/sti/c8sectpfe/Kconfig"
+endif #DVB_PLATFORM_DRIVERS