Add overlays for booting PPR on the `nrf9280pdk/nrf9280/cpuapp` target.
They are identical to the nRF54H ones because of similar DT structure.
Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>
This replacement for the `nordic-ppr-ram` snippet does the opposite:
enable PPR execution in place from MRAM.
Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>