kernel: modules: video: add missing video-mem2mem symbol

v4l2-mem2mem.ko needs CONFIG_V4L2_MEM2MEM_DEV symbol.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

package/kernel/linux/modules/video.mk

@@ -1112,7 +1112,9 @@ define KernelPackage/video-mem2mem
   TITLE:=Memory 2 Memory device support
   HIDDEN:=1
   DEPENDS:=+kmod-video-videobuf2
-  KCONFIG:= CONFIG_V4L_MEM2MEM_DRIVERS=y
+  KCONFIG:= \
+    CONFIG_V4L_MEM2MEM_DRIVERS=y \
+    CONFIG_V4L2_MEM2MEM_DEV
   FILES:= $(LINUX_DIR)/drivers/media/$(V4L2_DIR)/v4l2-mem2mem.ko
   AUTOLOAD:=$(call AutoLoad,66,v4l2-mem2mem)
   $(call AddDepends/video)