samples: bluetooth: peripheral_power_profiling: do system off for lv10/ns

Enable system off for lv10/ns.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

samples/bluetooth/peripheral_power_profiling/boards/nrf54lv10dk_nrf54lv10a_cpuapp_ns.conf

@@ -17,3 +17,6 @@ CONFIG_PM_DEVICE_RUNTIME=y
 
 # RRAM always on, not needed for basic bluetooth features.
 CONFIG_MPSL_FORCE_RRAM_ON_ALL_THE_TIME=n
+
+CONFIG_TFM_SFN=y
+CONFIG_TFM_NRF_SYSTEM_OFF_SERVICE=y