I use crochet to build images for Raspberry PI 2. With rpi-firware 1.20180328 and u-boot-rpi2 2018.03 everything is fine. But after update rpi-firware to 1.20180619 and u-boot-rpi2 to 2018.07 FreeBSD doesn't boot. Even nothing is shown on display.
You also need the dtb from the rpi-firmware package (bcm2709-rpi-2-b.dtb) and the mmc.dtbo overlay from the same package in the overlays directory on the fat partition.
It works, thanks.