Add the default `zephyr,ipc-icmsg` nodes for communication with
Application and Radiocore.
Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>
Add targets for the Application, Radio, and PPR cores in the nRF54H20
SoC on the nRF54H20 DK board.
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>