There are several esp32-based boards that its conf and overlay
files are missing proper renaming to match cpu cluster.
This also removes all _SOC_ name from files.
Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>
Update the booting information in recently added
Espressif boards to include simple boot method.
Signed-off-by: Marek Matej <marek.matej@espressif.com>