uboot-imx

efi_loader: create fdt reservation before copy

When copying the device we must ensure that the copy does not fall into a
memory area reserved by the same.

So let's change the sequence: first create memory reservations and then
copy the device tree.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>