I have followed the instructions for burning an image to a SD card for the NPi i.MX6ULL Dev Board. The board does boot up and I can login using debian account. However, I am trying to follow the instructions for burning the eMMC of which part of the instructions say to run the command ‘sudo fire-config’ This command fails saying there is no command fire-config. I have search for the command and indeed there seems to be no trace of it on SD card. Have I got the correct image?