Fix/Update copyright notices; Add SPDX annotation

Let's fix some erroneous/accidential references to wrong license,
update copyright information where applicable and introduce a
SPDX-License-Identifier to all files.

Change-Id: I39af26c6aaaf5c926966391f6565fc5936be21af
diff --git a/src/gsm/milenage/aes-encblock.c b/src/gsm/milenage/aes-encblock.c
index c4aa260..9fd73f6 100644
--- a/src/gsm/milenage/aes-encblock.c
+++ b/src/gsm/milenage/aes-encblock.c
@@ -10,6 +10,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/aes-internal-enc.c b/src/gsm/milenage/aes-internal-enc.c
index 4c00f96..6de9992 100644
--- a/src/gsm/milenage/aes-internal-enc.c
+++ b/src/gsm/milenage/aes-internal-enc.c
@@ -19,6 +19,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/aes-internal.c b/src/gsm/milenage/aes-internal.c
index 60c520c..c46654a 100644
--- a/src/gsm/milenage/aes-internal.c
+++ b/src/gsm/milenage/aes-internal.c
@@ -19,6 +19,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/aes.h b/src/gsm/milenage/aes.h
index ce42b20..5410c36 100644
--- a/src/gsm/milenage/aes.h
+++ b/src/gsm/milenage/aes.h
@@ -10,6 +10,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/aes_i.h b/src/gsm/milenage/aes_i.h
index 6df019a..3e0fd21 100644
--- a/src/gsm/milenage/aes_i.h
+++ b/src/gsm/milenage/aes_i.h
@@ -10,6 +10,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/aes_wrap.h b/src/gsm/milenage/aes_wrap.h
index 7d4d5d9..b644d4c 100644
--- a/src/gsm/milenage/aes_wrap.h
+++ b/src/gsm/milenage/aes_wrap.h
@@ -17,6 +17,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */
 
diff --git a/src/gsm/milenage/milenage.c b/src/gsm/milenage/milenage.c
index 012b399..7cf3312 100644
--- a/src/gsm/milenage/milenage.c
+++ b/src/gsm/milenage/milenage.c
@@ -12,6 +12,8 @@
  *
  * See README and COPYING for more details.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * This file implements an example authentication algorithm defined for 3GPP
  * AKA. This can be used to implement a simple HLR/AuC into hlr_auc_gw to allow
  * EAP-AKA to be tested properly with real USIM cards.
diff --git a/src/gsm/milenage/milenage.h b/src/gsm/milenage/milenage.h
index 1a4364d..ea93fda 100644
--- a/src/gsm/milenage/milenage.h
+++ b/src/gsm/milenage/milenage.h
@@ -11,6 +11,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */