Folder names corresponds to DT name. These boards have been renamed from
zc1275 to zcu1275 by commit shown below and this should be the part of that
commit.
Fixes: 420d446781 ("arm64: zynqmp: Rename zc1275 to zcu1275")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>