found some references to files (via :zephyr_file: and :zephyr-app:) that
were moved, so the links were broken
Fixes: #19660
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Cleanup references to boards in some of the example and use the same
boards through the examples. Other minot cleanups and make the text more
generic and not specific to certain boards.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>