Replace boiler plate licenses texts with the SPDX license identifiers in
Colibri/Apalis DTS files.
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
[treding@nvidia.com: drop unneeded parentheses, keep license at X11]
Signed-off-by: Thierry Reding <treding@nvidia.com>