hal: Revert copyright change for maxaudio file

Revert copyright change for thrid party copyright
files maxaudio.c and maxaudio.h

Change-Id: Ieeac155a5bbfcb4ff85881cb29a2b770dfa7e1a5
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>
diff --git a/hal/audio_extn/maxxaudio.c b/hal/audio_extn/maxxaudio.c
index 8830486..d8d3102 100644
--- a/hal/audio_extn/maxxaudio.c
+++ b/hal/audio_extn/maxxaudio.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2019 The Android Open Source Project
+ * Copyright (C) 2018 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/audio_extn/maxxaudio.h b/hal/audio_extn/maxxaudio.h
index 1ab7f80..4f45f79 100644
--- a/hal/audio_extn/maxxaudio.h
+++ b/hal/audio_extn/maxxaudio.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2019 The Android Open Source Project
+ * Copyright (C) 2018 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,4 +25,4 @@
 void ma_set_parameters(struct audio_device *adev,
                                   struct str_parms *parms);
 bool ma_supported_usb();
-#endif /* MAXXAUDIO_H_ */
\ No newline at end of file
+#endif /* MAXXAUDIO_H_ */