Some ZynqMP device trees in the kernel have a dot in their name,
for example "zynqmp-zcu102-rev1.0". The post image script
left out the part after the dot and created an invalid symlink.
Signed-off-by: Francois Beerten <fbeerten.git@colabti.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>