softdevice_handler: Use TRNG from Cracen

Use the entropy directly from the TRNG peripheral
of Cracen for Softdevice.
This is done because softdevice needs true RNG data
and internally calculates the PRNG data needed for
its operation.

Signed-off-by: Georgios Vasilakis <[email protected]>

Author: Vge0rge

subsys/softdevice_handler/nrf_sdh_soc.c

@@ -10,6 +10,7 @@
 #include <nrf_sdh_soc.h>
 #include <nrf_soc.h>
 #include <psa/crypto.h>
+#include <cracen_psa.h>
 #include <zephyr/logging/log.h>
 
 LOG_MODULE_DECLARE(nrf_sdh, CONFIG_NRF_SDH_LOG_LEVEL);
@@ -48,7 +49,7 @@ static void softdevice_rng_seed(void)
 	psa_status_t status;
 	uint8_t seed[SD_RAND_SEED_SIZE];
 
-	status = psa_generate_random(seed, sizeof(seed));
+	status = cracen_get_trng(seed, sizeof(seed));
 	if (status == PSA_SUCCESS) {
 		err = sd_rand_seed_set(seed);
 		memset(seed, 0, sizeof(seed));