ARM: dts: stm32: convert stm32mp15 board to OF_UPSTREAM

Enable OF_UPSTREAM flag for STM32MP15 platforms, except for
stm32mp15-odyssey,see following patch :

"configs: stm32: introduce stm32mp15-odyssey_defconfig"

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
32 files changed