MAINTAINERS: Update STi and STM32 maintainers emails in remaining files

A previous series already update STMicroelectronics emails maintainers
but some files have been omitted (Makefile, .dts, .dtsi and .rst files).
Update Patrick and my email address with the one dedicated to upstream
activities.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/board/st/stm32h743-disco/MAINTAINERS b/board/st/stm32h743-disco/MAINTAINERS
index e5e0b5a..60fbe34 100644
--- a/board/st/stm32h743-disco/MAINTAINERS
+++ b/board/st/stm32h743-disco/MAINTAINERS
@@ -1,5 +1,5 @@
 STM32H743 DISCOVERY BOARD
-M:	Patrice Chotard <patrice.chotard@st.com>
+M:	Patrice Chotard <patrice.chotard@foss.st.com>
 S:	Maintained
 F:	board/st/stm32h743-disco
 F:	include/configs/stm32h743-disco.h
diff --git a/board/st/stm32h743-disco/Makefile b/board/st/stm32h743-disco/Makefile
index 8fe7a2d..b6c22be 100644
--- a/board/st/stm32h743-disco/Makefile
+++ b/board/st/stm32h743-disco/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2017, STMicroelectronics - All Rights Reserved
-# Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
+# Author(s): Patrice CHOTARD, <patrice.chotard@foss.st.com> for STMicroelectronics.
 
 obj-y	:= stm32h743-disco.o