Simplify the license rows, standardize header macro name

class/audio/usbd_audio.h

@@ -1,27 +1,10 @@
-/**
- * @file usbd_audio.h
- * @brief
- *
- * Copyright (c) 2022 sakumisu
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.  The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
- * License for the specific language governing permissions and limitations
- * under the License.
+/*
+ * Copyright (c) 2022, sakumisu
  *
+ * SPDX-License-Identifier: Apache-2.0
  */
-#ifndef _USBD_AUDIO_H_
-#define _USBD_AUDIO_H_
+#ifndef USBD_AUDIO_H
+#define USBD_AUDIO_H
 
 #include "usb_audio.h"
 
@@ -45,4 +28,4 @@ void usbd_audio_sof_callback(void);
 }
 #endif
 
-#endif /* _USB_AUDIO_H_ */
+#endif /* USBD_AUDIO_H */