Try this: https://github.com/raspberrypi/linux/issues/435I do not believe the mmal_component is missing from the rootfs or it is not enabled somehow.I hate to mention this but it may have something to do with the the functionality of the component.
Also something like strace or even'sudo vcdbg syms | grep -i cam'would be useful if available of
the rootfs.
Sorry for this type of interaction. I am really busy with some other project.
If nothing works we could use OpenMax as you suggested to interact with the camera, but I still hope
this problem can be fixed.