package/v4l2loopback: enable CONFIG_MEDIA_CAMERA_SUPPORT kernel option

Setting CONFIG_VIDEO_DEV is no sufficient as drivers/media/Kconfig has
some very convoluted logic to hide some options behind a
CONFIG_MEDIA_SUPPORT_FILTER option, unless CONFIG_EXPERT is
enabled. Due to this, several arch defconfigs don't have
CONFIG_VIDEO_DEV enabled when doing $(call
KCONFIG_ENABLE_OPT,CONFIG_VIDEO_DEV).

To fix this, we enable one of the possible options that ensures
CONFIG_VIDEO_DEV is enabled, and we've more or less arbitrarily chosen
CONFIG_MEDIA_CAMERA_SUPPORT.

Fixes:

  http://autobuild.buildroot.net/results/2a337d29e7870564027bcd42bd0addd228eb6a24/

We've tried to track down which kernel version introduced this
exactly, but it's been introduced a while ago and step by step making
it difficult to pin-point which version version exactly introduced
this. But the issue has been appearing for quite some time in the
autobuilders, so it's clearly not a recent issue.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 75d418b59d4ffe251ffcd49c06ccf0f1d0b86e04)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/v4l2loopback/v4l2loopback.mk

@@ -24,6 +24,7 @@ define V4L2LOOPBACK_LINUX_CONFIG_FIXUPS
 	$(call KCONFIG_ENABLE_OPT,CONFIG_MEDIA_SUPPORT)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_I2C)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_VIDEO_DEV)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_MEDIA_CAMERA_SUPPORT)
 endef
 
 $(eval $(kernel-module))