V4L/DVB (11881): one kconfig controls them all

Add a kconfig symbol that allows someone to disable all
multimedia config options at one time.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/Kconfig

@@ -2,8 +2,14 @@
 # Multimedia device configuration
 #
 
-menu "Multimedia devices"
+menuconfig MEDIA_SUPPORT
+	tristate "Multimedia support"
 	depends on HAS_IOMEM
+	help
+	  If you want to use Video for Linux, DVB for Linux, or DAB adapters,
+	  enable this option and other options below.
+
+if MEDIA_SUPPORT
 
 comment "Multimedia core support"
 
@@ -136,4 +142,4 @@ config USB_DABUSB
 	  module will be called dabusb.
 endif # DAB
 
-endmenu
+endif # MEDIA_SUPPORT