Bluetooth: Add skeleton for SMP self-tests

This patch adds the initial skeleton and kernel config option for SMP
self-tests.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/selftest.c b/net/bluetooth/selftest.c
index b9cb33c..a7602b3 100644
--- a/net/bluetooth/selftest.c
+++ b/net/bluetooth/selftest.c
@@ -22,8 +22,10 @@
 */
 
 #include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
 
 #include "ecc.h"
+#include "smp.h"
 #include "selftest.h"
 
 #if IS_ENABLED(CONFIG_BT_SELFTEST_ECDH)
@@ -195,7 +197,12 @@
 	BT_INFO("Starting self testing");
 
 	err = test_ecdh();
+	if (err)
+		goto done;
 
+	err = bt_selftest_smp();
+
+done:
 	BT_INFO("Finished self testing");
 
 	return err;