stv0991: fix STMicroelectronics copyright

Uniformize STMicroelectronics copyrights headers for STV0991
related code.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/cpu/armv7/stv0991/Makefile b/arch/arm/cpu/armv7/stv0991/Makefile
index 95641d3..046b240 100644
--- a/arch/arm/cpu/armv7/stv0991/Makefile
+++ b/arch/arm/cpu/armv7/stv0991/Makefile
@@ -1,6 +1,6 @@
 #
-# (C) Copyright 2014
-# Vikas Manocha, ST Microelectronics, vikas.manocha@stcom
+# Copyright (C) 2014, STMicroelectronics - All Rights Reserved
+# Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
 #
 # SPDX-License-Identifier:	GPL-2.0+
 #