Group files for board licheepi_zero under the existing manufacturer
directory, like all the other boards by Sipeed.
Signed-off-by: Francois Dugast <francois.dugast.foss@gmail.com>
[yann.morin.1998@free.fr: use the manufacturer sub-dir]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
