The new image for Odroid C2 now seem perfect, congratulations!
But there is another little problem remaining.
The hardware-watchdog for this C2-board needs the module “gxbb_wdt”. This was available in the “old” buster-image, but not in the last image. Are there any chances to include it. Source is available at https://kernel.googlesource.com/pub/scm/linux/kernel/git/ast/bpf/+/refs/heads/bind_connect_v3/drivers/watchdog/meson_gxbb_wdt.c.
Or is there another solution to use the hardware-watchdog on the C2?