src/superio: replace license boilerplate with SPDX

The authors from the header of the files are added in a previous commit.

Change-Id: Iafeaafb9689c65bd2f5de3960097ec0d4c1009e7
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38544
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/superio/nsc/pc87384/Kconfig b/src/superio/nsc/pc87384/Kconfig
index f50e522..cb34487 100644
--- a/src/superio/nsc/pc87384/Kconfig
+++ b/src/superio/nsc/pc87384/Kconfig
@@ -1,17 +1,5 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright (C) 2009 Ronald G. Minnich
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; version 2 of the License.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
+# SPDX-License-Identifier: GPL-2.0-only
+# This file is part of the coreboot project.
 
 config SUPERIO_NSC_PC87384
 	bool
diff --git a/src/superio/nsc/pc87384/Makefile.inc b/src/superio/nsc/pc87384/Makefile.inc
index bd6a875..eefef1c 100644
--- a/src/superio/nsc/pc87384/Makefile.inc
+++ b/src/superio/nsc/pc87384/Makefile.inc
@@ -1,17 +1,4 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This file is part of the coreboot project.
 
 ramstage-$(CONFIG_SUPERIO_NSC_PC87384) += superio.c
diff --git a/src/superio/nsc/pc87384/pc87384.h b/src/superio/nsc/pc87384/pc87384.h
index 2184584..579def4 100644
--- a/src/superio/nsc/pc87384/pc87384.h
+++ b/src/superio/nsc/pc87384/pc87384.h
@@ -1,18 +1,5 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* This file is part of the coreboot project. */
 
 #ifndef SUPERIO_NSC_PC87384_H
 #define SUPERIO_NSC_PC87384_H
diff --git a/src/superio/nsc/pc87384/superio.c b/src/superio/nsc/pc87384/superio.c
index 87dd265..14bd059 100644
--- a/src/superio/nsc/pc87384/superio.c
+++ b/src/superio/nsc/pc87384/superio.c
@@ -1,18 +1,5 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* This file is part of the coreboot project. */
 
 #include <device/device.h>
 #include <device/pnp.h>