stm32: fix STMicroelectronics copyright

Uniformize STMicroelectronics copyrights headers for STM32
related code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/clk/clk_stm32f7.c b/drivers/clk/clk_stm32f7.c
index 96a06b8..a273f8f 100644
--- a/drivers/clk/clk_stm32f7.c
+++ b/drivers/clk/clk_stm32f7.c
@@ -1,9 +1,10 @@
 /*
- * (C) Copyright 2017
- * Vikas Manocha, <vikas.manocha@st.com>
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
+
 #include <common.h>
 #include <clk-uclass.h>
 #include <dm.h>