Thread:Talk:R-Car/Boards/Yocto-Gen3/Can't Modify U-Boot Environment Variables on Updated Firmware

I am trying to get up and running with the R-Car H3 Starter Kit Premier Board (h3ulcb). I first followed the instructions here http://elinux.org/R-Car/Boards/Yocto-Gen3 to build Yocto 2.19 for the board. When I attempted to run the built Yocto image on the board, I received a kernel panic message. The limited resources on the internet indicated this was likely due to outdated firmware (ie. I then followed the instructions here http://elinux.org/R-Car/Boards/H3SK#Flashing_firmware to update the firmware on the board. Now when I turn the board on, I am not given the option of cancelling autoboot. The board simply attempts to read from the specified boot file and I am not able to follow the usual process of cancelling autoboot and changing U-Boot's environment variables. Any help would be greatly appreciated!

Output of boot sequence is below: