As nRF54L15 supports retained_mem driver,
this test should be executed on this target.
Signed-off-by: Nikodem Kastelik <nikodem.kastelik@nordicsemi.no>
`checkpatch.pl` requires that dts sources are indented with tabs,
fix all the spaces that slipped in while checkpatch wasn't watching.
Signed-off-by: Jordan Yates <jordan@embeint.com>
Adds a test for the retained memory driver interface using GPREGRET
and RAM backends for the nrf52840dk_nrf52840 board and RAM backend
for qemu_cortex_m3 board.
Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
