platform/x86: intel_scu_ipc: Convert to use SPDX identifier

Reduce size of duplicated comments by switching to use SPDX identifier.

No functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/intel_scu_ipc.c

+// SPDX-License-Identifier: GPL-2.0
 /*
- * intel_scu_ipc.c: Driver for the Intel SCU IPC mechanism
+ * Driver for the Intel SCU IPC mechanism
  *
  * (C) Copyright 2008-2010,2015 Intel Corporation
  * Author: Sreedhara DS (sreedhara.ds@intel.com)
  *
- * 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.
- *
  * SCU running in ARC processor communicates with other entity running in IA
  * core through IPC mechanism which in turn messaging between IA core ad SCU.
  * SCU has two IPC mechanism IPC-1 and IPC-2. IPC-1 is used between IA32 and

drivers/platform/x86/intel_scu_ipcutil.c

+// SPDX-License-Identifier: GPL-2.0
 /*
- * intel_scu_ipc.c: Driver for the Intel SCU IPC mechanism
+ * Driver for the Intel SCU IPC mechanism
  *
  * (C) Copyright 2008-2010 Intel Corporation
  * Author: Sreedhara DS (sreedhara.ds@intel.com)
  *
- * 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 driver provides ioctl interfaces to call intel scu ipc driver api
+ * This driver provides IOCTL interfaces to call Intel SCU IPC driver API.
  */
 
 #include <linux/errno.h>
@@ -26,7 +22,7 @@
 
 static int major;
 
-/* ioctl commnds */
+/* IOCTL commands */
 #define	INTE_SCU_IPC_REGISTER_READ	0
 #define INTE_SCU_IPC_REGISTER_WRITE	1
 #define INTE_SCU_IPC_REGISTER_UPDATE	2