Beaglebone Black boot from NAND

Hi there,
I’m playing with BBB black at the moment. Using the following article I got it work as described.

Now I have a custom board based on BBB with NAND installed ( MT29F4G16ABADAWP ). The only way to boot this board is to flash uboot image on it. I got NAND_Flashing_Tool CCS project for burning. And I’m in stuck with Uboot - how can I enable booting from NAND? What configuration option should I turn on?

Any help is highly appreciated as I’m a newbie with this low level stuff.

Thanks a lot in advance,
BR, Dmitry