board: Add stm32h7 SoC, discovery and evaluation boards support

This patch adds support for stm32h7 soc family, stm32h743
discovery and evaluation boards.

For more information about STM32H7 series, please visit:
http://www.st.com/en/microcontrollers/stm32h7-series.html

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/st/stm32h743-disco/MAINTAINERS b/board/st/stm32h743-disco/MAINTAINERS
new file mode 100644
index 0000000..e5e0b5a
--- /dev/null
+++ b/board/st/stm32h743-disco/MAINTAINERS
@@ -0,0 +1,7 @@
+STM32H743 DISCOVERY BOARD
+M:	Patrice Chotard <patrice.chotard@st.com>
+S:	Maintained
+F:	board/st/stm32h743-disco
+F:	include/configs/stm32h743-disco.h
+F:	configs/stm32h743-disco_defconfig
+F:	arch/arm/dts/stm32h7*