[nrf fromtree] bluetooth: host/crypto: fix the psa crypto init for host

psa_crypto_init was bounded to CONFIG_BT_HOST_CRYPTO_PRNG and
used to be called under prng_init. Updating the ifdef condition
and appropriating the function name for crypto init.

Also it is better to make sure psa_crypto_init called by host.

Signed-off-by: alperen sener <[email protected]>
(cherry picked from commit 22de0b3)

Author: m-alperen-sener

subsys/bluetooth/host/crypto.h

@@ -5,4 +5,4 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-int prng_init(void);
+int bt_crypto_init(void);

subsys/bluetooth/host/crypto_psa.c

@@ -27,7 +27,7 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(bt_host_crypto);
 
-int prng_init(void)
+int bt_crypto_init(void)
 {
 	psa_status_t status = psa_crypto_init();
 

subsys/bluetooth/host/hci_core.c

@@ -3287,11 +3287,9 @@ static int common_init(void)
 	read_supported_commands_complete(rsp);
 	net_buf_unref(rsp);
 
-	if (IS_ENABLED(CONFIG_BT_HOST_CRYPTO_PRNG)) {
-		/* Initialize the PRNG so that it is safe to use it later
-		 * on in the initialization process.
-		 */
-		err = prng_init();
+	if (IS_ENABLED(CONFIG_BT_HOST_CRYPTO)) {
+		/* Initialize crypto for host */
+		err = bt_crypto_init();
 		if (err) {
 			return err;
 		}