Re-license contributions from Raptor Computer Systems

The following files contain contributions from Timothy Pearson at Raptor
Computer Systems. He has agreed to re-license these contributions as
Dual Apache 2.0 / GPLv2+, so amend the SPDX tag to reflect that.

	hw/phb4.c
	include/phb4.h
	include/platform.h
	platforms/astbmc/talos.c
	platforms/astbmc/romulus.c

Cc: Timothy Pearson <tpearson@raptorengineering.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

hw/phb4.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /*
  * PHB4: PCI Host Bridge 4, in POWER9
  *

include/phb4.h

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2019 IBM Corp. */
 
 #ifndef __PHB4_H

include/platform.h

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2019 IBM Corp. */
 
 #ifndef __PLATFORM_H

platforms/astbmc/romulus.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2017-2019 IBM Corp. */
 
 #include <skiboot.h>

platforms/astbmc/talos.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /*
  * Copyright 2017-2019 IBM Corp.
  * Copyright 2018-2019 Raptor Engineering, LLC