These DT files will be used by STM32MP2 boards. They embed DDR parameters for DDR4 2x8Gb 2*16bits, at 800MHz or 1200MHz. Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> Change-Id: Iec73f9c5028f897624125082bdb591274aad3afc