dsp: update copyright marking for q6afecal-hwdep and q6asm

Copyright year 2018 for q6afecal-hwdep and third party copyright
marking for q6asm are removed during updating file headers.
Add them back.

Change-Id: I0341116ca0cf82be8c3876534b98ad2c376b3531
Signed-off-by: Meng Wang <[email protected]>

dsp/q6afecal-hwdep.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2015, 2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015, 2017 - 2018, The Linux Foundation. All rights reserved.
  */
 #include <linux/kernel.h>
 #include <linux/platform_device.h>

dsp/q6asm.c

@@ -1,6 +1,17 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
+ * Author: Brian Swetland <[email protected]>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
  */
 #include <linux/fs.h>
 #include <linux/mutex.h>