Re-license IBM written files as Apache 2.0 OR GPLv2+

SPDX makes it a simpler diff.

I have audited the commit history of each file to ensure that they are
exclusively authored by IBM and thus we have the right to relicense.

The motivation behind this is twofold:
1) We want to enable experiments with coreboot, which is GPLv2 licensed
2) An upcoming firmware component wants to incorporate code from skiboot
   and code from the Linux kernel, which is GPLv2 licensed.

I have gone through the IBM internal way of gaining approval for this.

The following files are not exclusively authored by IBM, so are *not*
included in this update (I will be seeking approval from contributors):

core/direct-controls.c
core/flash.c
core/pcie-slot.c
external/common/arch_flash_unknown.c
external/common/rules.mk
external/gard/Makefile
external/gard/rules.mk
external/opal-prd/Makefile
external/pflash/Makefile
external/xscom-utils/Makefile
hdata/vpd.c
hw/dts.c
hw/ipmi/ipmi-watchdog.c
hw/phb4.c
include/cpu.h
include/phb4.h
include/platform.h
libflash/libffs.c
libstb/mbedtls/sha512.c
libstb/mbedtls/sha512.h
platforms/astbmc/barreleye.c
platforms/astbmc/garrison.c
platforms/astbmc/mihawk.c
platforms/astbmc/nicole.c
platforms/astbmc/p8dnu.c
platforms/astbmc/p8dtu.c
platforms/astbmc/p9dsu.c
platforms/astbmc/vesnin.c
platforms/rhesus/ec/config.h
platforms/rhesus/ec/gpio.h
platforms/rhesus/gpio.c
platforms/rhesus/rhesus.c
platforms/astbmc/talos.c
platforms/astbmc/romulus.c

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
[oliver: fixed up the drift]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

9 files changed, 9 insertions, 9 deletions

diff --git a/libflash/test/mbox-server.c b/libflash/test/mbox-server.c
index 59786ca..8a68cff 100644
--- a/libflash/test/mbox-server.c
+++ b/libflash/test/mbox-server.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 IBM Corp. */
 
 #include <stdio.h>
diff --git a/libflash/test/mbox-server.h b/libflash/test/mbox-server.h
index b573f34..e7aec81 100644
--- a/libflash/test/mbox-server.h
+++ b/libflash/test/mbox-server.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2017 IBM Corp. */
 
 #include <stdint.h>
diff --git a/libflash/test/stubs.c b/libflash/test/stubs.c
index 30ccf4c..09f0043 100644
--- a/libflash/test/stubs.c
+++ b/libflash/test/stubs.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /*
  * Stubs for libflash test
  *
diff --git a/libflash/test/stubs.h b/libflash/test/stubs.h
index ec408bc..3f890c9 100644
--- a/libflash/test/stubs.h
+++ b/libflash/test/stubs.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2018 IBM Corp. */
 
 #include <lock.h>
diff --git a/libflash/test/test-blocklevel.c b/libflash/test/test-blocklevel.c
index 4f5adc1..7a4fe19 100644
--- a/libflash/test/test-blocklevel.c
+++ b/libflash/test/test-blocklevel.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2018 IBM Corp. */
 
 #include <stdio.h>
diff --git a/libflash/test/test-ecc.c b/libflash/test/test-ecc.c
index af5f42f..b9489f8 100644
--- a/libflash/test/test-ecc.c
+++ b/libflash/test/test-ecc.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2018 IBM Corp. */
 
 #include <stdio.h>
diff --git a/libflash/test/test-flash.c b/libflash/test/test-flash.c
index 9cc8499..3304195 100644
--- a/libflash/test/test-flash.c
+++ b/libflash/test/test-flash.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2013-2017 IBM Corp. */
 
 #include <stdio.h>
diff --git a/libflash/test/test-ipmi-hiomap.c b/libflash/test/test-ipmi-hiomap.c
index d3343fe..6117e9d 100644
--- a/libflash/test/test-ipmi-hiomap.c
+++ b/libflash/test/test-ipmi-hiomap.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2018-2019 IBM Corp. */
 
 #include <assert.h>
diff --git a/libflash/test/test-mbox.c b/libflash/test/test-mbox.c
index 6e30b9e..260a3c7 100644
--- a/libflash/test/test-mbox.c
+++ b/libflash/test/test-mbox.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 /* Copyright 2017-2018 IBM Corp. */
 
 #include <stdio.h>