drivers: Use SPDX identifiers

Convert the remaining files in src/drivers to use SPDX identifiers.

int15.h and default_brightness_levels.asl did not have license headers,
but they were both copied from other GPL2 files, so they should be under
the GPL2 as well.

ne2k.c and drm_dp_helper.h are licensed under custom BSD-like licenses
that do not have an SPDX equivalent, so they are added as exceptions
to the license header lint.

Change-Id: I87fb1c637b8d11b0463f7c19f70b847413e14aed
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41601
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/drivers/intel/gma/acpi/default_brightness_levels.asl

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
 #include "gma.asl"
 
 Scope (GFX0)

src/drivers/intel/gma/int15.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
 int intel_vga_int15_handler(void);
 
 enum {

src/drivers/net/ns8390.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
 /**************************************************************************
 ETHERBOOT -  BOOTP/TFTP Bootstrap Program
 
@@ -6,8 +8,6 @@ Author: Martin Renters
 
 **************************************************************************/
 
-//FILE_LICENCE ( BSD2 );
-
 #define VENDOR_NONE	0
 #define VENDOR_WD	1
 #define VENDOR_NOVELL	2

src/drivers/vpd/vpd.c

@@ -1,8 +1,4 @@
-/*
- * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
+/* SPDX-License-Identifier: BSD-3-Clause */
 
 #include <assert.h>
 #include <console/console.h>

src/drivers/vpd/vpd.h

@@ -1,8 +1,4 @@
-/*
- * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
+/* SPDX-License-Identifier: BSD-3-Clause */
 
 #ifndef __VPD_H__
 #define __VPD_H__

src/drivers/vpd/vpd_decode.c

@@ -1,8 +1,6 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
 /*
- * Copyright 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
  * This is a copy from upstream:
  * https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/lib/vpd_decode.c
  */

src/drivers/vpd/vpd_decode.h

@@ -1,8 +1,6 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
 /*
- * Copyright 2019 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
  * This is a copy from upstream:
  * https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/include/lib/vpd_decode.h
  */

src/drivers/vpd/vpd_tables.h

@@ -1,10 +1,6 @@
-/*
- * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * Ported from mosys project (http://code.google.com/p/mosys/).
- */
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+/* Ported from mosys project (http://code.google.com/p/mosys/). */
 
 #ifndef __LIB_VPD_TABLES_H__
 #define __LIB_VPD_TABLES_H__