stm32: fix STMicroelectronics copyright

Uniformize STMicroelectronics copyrights headers for STM32
related code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32/stm32h7/Makefile b/arch/arm/mach-stm32/stm32h7/Makefile
index 97f92f7..cba2e3b 100644
--- a/arch/arm/mach-stm32/stm32h7/Makefile
+++ b/arch/arm/mach-stm32/stm32h7/Makefile
@@ -1,6 +1,6 @@
 #
-# Copyright (c) 2017
-# Patrice Chotard <patrice.chotard@st.com>
+# Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+# Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
 #
 # SPDX-License-Identifier:	GPL-2.0+
 #