media: Kconfig: add an option to filter in/out platform drivers

Most systems don't need support for those, while others only
need those, instead of the others.

So, add an option to filter in/out platform drivers.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/Kconfig

@@ -87,6 +87,18 @@ config MEDIA_CEC_SUPPORT
 	  Say Y when you have an HDMI receiver, transmitter or a USB CEC
 	  adapter that supports HDMI CEC.
 
+config MEDIA_PLATFORM_SUPPORT
+	bool "Platform-specific devices support"
+	help
+	  Enable support for complex cameras, codecs, and other hardware
+	  that are integrated at the CPU, GPU or on Image Signalling Processor
+	  and don't use PCI, USB or Firewire buses.
+
+	  This is found on Embedded hardware (SoC), on V4L2 codecs and
+	  on some GPU and newer CPU chipsets.
+
+	  Say Y when you want to be able so see such devices.
+
 source "drivers/media/cec/Kconfig"
 
 source "drivers/media/mc/Kconfig"
@@ -161,15 +173,14 @@ source "drivers/media/dvb-core/Kconfig"
 
 comment "Media drivers"
 
-#
-# V4L platform/mem2mem drivers
-#
-
 source "drivers/media/usb/Kconfig"
 source "drivers/media/pci/Kconfig"
+source "drivers/media/radio/Kconfig"
+
+if MEDIA_PLATFORM_SUPPORT
 source "drivers/media/platform/Kconfig"
 source "drivers/media/mmc/Kconfig"
-source "drivers/media/radio/Kconfig"
+endif
 
 comment "Supported FireWire (IEEE 1394) Adapters"
 	depends on DVB_CORE && FIREWIRE