My board is Odroid HC1
Using balenaEtcher under Windows 10 I have instaled today Armbian_20.05.7_Odroidxu4_buster_current_5.4.50_minimal.img.xz and also was trying before Armbian_20.05.7_Odroidxu4_buster_legacy_4.14.187.img.xz.
On both images I wanted to increase verbosity to 7 to see in serial console boot process.
Changes in boot.ini are not used during boot until symlink /boot.ini is created which point to /boot/boot.ini
Until this is done you will se uboot error that script /boot.ini is not found.
Please add this symlink to images for XU4/HC1.