[Buildroot] Module autoloading based on info from device tree

Hello everyone! What is going on with autoloading modules for platform
devices from device tree? I've build image for raspberry pi, added device
tree overlay for enc28j60. I've checked: device tree node with this device
exists in /proc/device-tree/soc/spi at 7e204000. But lsmod does not shows that
enc28j60.ko is not loaded. In contrast of, raspbian distro successfully
managed with this - module loaded successfully.
Also, I've read this thread:
http://lists.busybox.net/pipermail/buildroot/2016-December/178779.html. As
I understand, command

find /sys/ -name modalias -print0 | xargs -0 sort -u -z | xargs -0
modprobe -abq

does not work...

Regards,

Artem Synytsyn
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