MLK-21035 plat: imx: fix the license issue

clean up & fix the license issue

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
(cherry picked from commit ec9654ad35f560440a183771d0b802988971b7c7)
diff --git a/plat/imx/imx8mq/gpc.c b/plat/imx/imx8mq/gpc.c
index 5b25228..6b8e341 100644
--- a/plat/imx/imx8mq/gpc.c
+++ b/plat/imx/imx8mq/gpc.c
@@ -1,15 +1,7 @@
 /*
- * Copyright 2017 NXP
+ * Copyright 2017-2019 NXP
  *
- * 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: BSD-3-Clause
  */
 
 #include <debug.h>
diff --git a/plat/imx/imx8mq/imx8mq_bl31_setup.c b/plat/imx/imx8mq/imx8mq_bl31_setup.c
index 2969605..155a11a 100644
--- a/plat/imx/imx8mq/imx8mq_bl31_setup.c
+++ b/plat/imx/imx8mq/imx8mq_bl31_setup.c
@@ -2,31 +2,7 @@
  * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
  * Copyright 2017 NXP
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <arch_helpers.h>
diff --git a/plat/imx/imx8mq/imx8mq_psci.c b/plat/imx/imx8mq/imx8mq_psci.c
index 9d21bff..5cc8d17 100644
--- a/plat/imx/imx8mq/imx8mq_psci.c
+++ b/plat/imx/imx8mq/imx8mq_psci.c
@@ -2,31 +2,7 @@
  * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
  * Copyright 2017 NXP
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <arch.h>
diff --git a/plat/imx/imx8mq/include/soc.h b/plat/imx/imx8mq/include/soc.h
index aa7d432..4500f62 100644
--- a/plat/imx/imx8mq/include/soc.h
+++ b/plat/imx/imx8mq/include/soc.h
@@ -1,15 +1,7 @@
 /*
- * Copyright 2017 NXP
+ * Copyright 2017-2019 NXP
  *
- * 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: BSD-3-Clause
  */
 
 #ifndef __IMX_SOC_H