Device tree overlays now have the extension 'dtso' that
distinguishes them from board 'dts' files, so there is
no need for a prefix '_ov_' to tell if a file contains
a DT overlay.
To make them shorter and easier to tell the platform they
are for, change the filename format to:
<platform-name>_<functionality>.dtso
where <platform-name> can be the name of the SOM or the
name of the DVK, so there is no need either to specify
'som' or 'board' on the filename.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
ebbf61e15c