As Zephyr currently requires CMake version 3.20.0, update all
occurrences of cmake_minimum_required.
Signed-off-by: Reto Schneider <reto.schneider@husqvarnagroup.com>
Add a new application for testing non-core devicetree functionality.
Add tests for the default and fallback case of
`LINKER_DT_NODE_REGION_NAME`.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>