Test was marked build only with filters in each scenario looking for
sdl-dc which is only available on native_sim, so cut the chase and use
platform_only to narrow things down to native_sim directly instead of
building the world to get information we already know.
reduces build/run time from 78s to 17s on invocation of twister with
default options, saves a ton more when running twister with --all.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Add test cases for testing basic CFB functions.
These tests cannot run in CI because the CI environment has no display.
Mark these tests as `build_only`.
Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
