Relocating the device tree is required for being apply to apply
device tree overylay at boot.
Fixes: 34bb33094a ("mediatek: use updated device tree overlay mechanism for BPi-R64")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit a8cbee8e2d11dd139c1dea1f7289bdf28b1e2b52)