chore:update license

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

st_license.txt

@@ -1,16 +1,6 @@
-/**
-  ******************************************************************************
-  * @file    st_license.txt
-  * @author  MCD Application Team
-  * @brief   FatFs opensource stack
-  ******************************************************************************
-  *
-  * Copyright (c) 2019 STMicroelectronics. All rights reserved.
-  *
-  * This software component is licensed by ST under BSD 3-Clause license,
-  * the "License"; You may not use this file except in compliance with the
-  * License. You may obtain a copy of the License at:
-  *                       opensource.org/licenses/BSD-3-Clause
-  *
-  ******************************************************************************
-**/
+This software component is provided to you as part of a software package and
+applicable license terms are in the  Package_license file. If you received this
+software component outside of a package or without applicable license terms,
+the terms of the BSD-3-Clause license shall apply.
+You may obtain a copy of the BSD-3-Clause at:
+https://opensource.org/licenses/BSD-3-Clause