The Ubiquiti UniFi 6 Lite does not correctly align the FDT by always
setting fdt_high to 0xffffffff when invoking the bootubnt command.
Work around this issue by loading the DTB to a valid,aligned address, so
the bootloader does not have to relocate the FDT automatically.
Note: The device does read the kernel before invoking bootm on the FIT
image to 0x86000000.
Signed-off-by: David Bauer <mail@david-bauer.net>