configure the FDT address

# https://github.com/armbian/build/blob/master/config/bootscripts/boot-sun50i-next.cmd#L7
setenv devtype mmc
setenv devnum 0:1
setenv prefix /boot/

setenv load_addr "0x45000000"
setenv overlay_error "false"
setenv rootdev "/dev/mmcblk0p1"
setenv verbosity "1"
setenv rootfstype "ext4"
setenv console "both"
setenv docker_optimizations "on"
setenv bootlogo "false"

# Print boot source
itest.b *0x10028 == 0x00 && echo "U-boot loaded from SD"
itest.b *0x10028 == 0x02 && echo "U-boot loaded from eMMC or secondary SD"
itest.b *0x10028 == 0x03 && echo "U-boot loaded from SPI"

echo "Boot script loaded from ${devtype}"

load ${devtype} ${devnum} ${load_addr} ${prefix}armbianEnv.txt
env import -t ${load_addr} ${filesize}

setenv consoleargs "splash=verbose console=ttyS0,115200"

part uuid mmc 0:1 partuuid

setenv bootargs "root=${rootdev} rootwait rootfstype=${rootfstype} ${consoleargs} consoleblank=0 loglevel=${verbosity} ubootpart=${partuuid} usb-storage.quirks=${usbstoragequirks} ${extraargs} ${extraboardargs}"

if test "${docker_optimizations}" = "on"; then setenv bootargs "${bootargs} cgroup_enable=memory swapaccount=1"; fi

load ${devtype} ${devnum} ${fdt_addr_r} ${prefix}dtb/${fdtfile}
fdt addr ${fdt_addr_r}
fdt resize 65536

load ${devtype} ${devnum} ${ramdisk_addr_r} ${prefix}uInitrd
load ${devtype} ${devnum} ${kernel_addr_r} ${prefix}Image

booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}