Bluetooth: Move smp.h header file into net/bluetooth/

The smp.h header file is only used internally by the bluetooth.ko
module and is not a public API. So make it local to the core
Bluetooth module.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 8141c8d..1395871 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -28,8 +28,8 @@
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
-#include <net/bluetooth/smp.h>
 
+#include "smp.h"
 #include "a2mp.h"
 
 struct sco_param {