media: Kconfig: mark other drivers as test drivers

Neither the PCI skeleton nor the DVB dummy driver are real
drivers. They're there just as an example for a driver
writter.

Distros should not enable those drivers. So, hide them if
MEDIA_TEST_SUPPORT is not selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/dvb-frontends/Kconfig

@@ -944,8 +944,12 @@ config DVB_SP2
 	  CIMaX SP2/SP2HF Common Interface module.
 
 comment "Tools to develop new frontends"
+	depends on MEDIA_TEST_SUPPORT
 
 config DVB_DUMMY_FE
 	tristate "Dummy frontend driver"
 	depends on DVB_CORE
+	depends on MEDIA_TEST_SUPPORT
+	help
+	  Dummy skeleton frontend driver.
 endmenu

drivers/media/pci/Kconfig

@@ -58,6 +58,7 @@ source "drivers/media/pci/intel/ipu3/Kconfig"
 
 config VIDEO_PCI_SKELETON
 	tristate "Skeleton PCI V4L2 driver"
+	depends on MEDIA_TEST_SUPPORT
 	depends on PCI
 	depends on SAMPLES
 	depends on VIDEO_V4L2 && VIDEOBUF2_CORE