In the mean time i found a LE25FU206A chip and modified the patch to support both chips. So with this patch LE25FU206 and LE25FU206A are supported. Unfortunately i have not found any datasheet for 206A. So it's only guessing that the 206A is the same as 206.
I tested the 206A and it works. Maybe someone has a datasheet and can verify the patch? I have both chips and can test it.