add copyright file header with Apache License

bsp/raspberry-pi/raspi4-32/driver/drv_eth.c

+
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-10-30     bigmagic       first version
+ */
+
 #include <rthw.h>
 #include <stdint.h>
 #include <rtthread.h>

bsp/raspberry-pi/raspi4-32/driver/drv_eth.h

@@ -6,7 +6,7 @@
  *
  * Change Logs:
  * Date           Author         Notes
- * 2020-04-16     bigmagic       first version
+ * 2020-10-30     bigmagic       first version
  */
 
 #ifndef __DRV_ETH_H__