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/arch/arm/mach-stm32/stm32h7/Makefile b/arch/arm/mach-stm32/stm32h7/Makefile
new file mode 100644
index 0000000..97f92f7
--- /dev/null
+++ b/arch/arm/mach-stm32/stm32h7/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2017
+# Patrice Chotard <patrice.chotard@st.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += soc.o