hi,
i just installed your image on nand. everything works, but when i update the kernel or want to switch to mainline kernel, they are not booted.
instead it's always kernel version: 3.4.75+
the version linux-sun7i-3.4.103-5 or linux-armv7-4.0.0-1 install without problems, but i don't know how to boot them.
kind regard,
fabian