[bsp][qemu-vexpress-a9][stm32l475-atk-pandora]add audio driver copyright file header.

bsp/qemu-vexpress-a9/drivers/audio/drv_sound.c

 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Date           Author       Notes

bsp/qemu-vexpress-a9/drivers/audio/drv_sound.h

 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Date           Author       Notes

bsp/stm32/stm32l475-atk-pandora/board/ports/audio/drv_es8388.c

 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Date           Author       Notes

bsp/stm32/stm32l475-atk-pandora/board/ports/audio/drv_es8388.h

 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Date           Author       Notes

bsp/stm32/stm32l475-atk-pandora/board/ports/audio/drv_mic.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Date           Author       Notes
+ * 2019-07-31     Zero-Free    first implementation
+ */
+
 #include <board.h>
 
 #include "drv_es8388.h"

bsp/stm32/stm32l475-atk-pandora/board/ports/audio/drv_sound.c

 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Date           Author       Notes

bsp/stm32/stm32l475-atk-pandora/board/ports/audio/drv_sound.h

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Date           Author       Notes
+ * 2019-07-31     Zero-Free    first implementation
+ */
+
 #ifndef __DRV_SOUND_H__
 #define __DRV_SOUND_H__