Bluetooth: Make mgmt_new_ltk() return void

The return value of mgmt_new_ltk() function is not used and
so just change it to return void.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 1ed0b3e..90d9353 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4382,7 +4382,7 @@
 	mgmt_event(MGMT_EV_NEW_LINK_KEY, hdev, &ev, sizeof(ev), NULL);
 }
 
-int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent)
+void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent)
 {
 	struct mgmt_ev_new_long_term_key ev;
 
@@ -4401,8 +4401,7 @@
 	memcpy(ev.key.rand, key->rand, sizeof(key->rand));
 	memcpy(ev.key.val, key->val, sizeof(key->val));
 
-	return mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev, &ev, sizeof(ev),
-			  NULL);
+	mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev, &ev, sizeof(ev), NULL);
 }
 
 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,