Commit dc7b1c0 (rpi-firmware: bump version) bumped rpi-firmware to a version
based on kernel 4.4.x, but didn't update the overlay logic to handle the
.dtbo files from dynamic device tree support.
For details, see:
https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=139732
[Peter: extend description]
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>