feat(stm32mp2): load FW binaries to DDR

Now that DDR is initialized, we can load the different firmware
parts:  BL32 (OP-TEE header), BL32 extra1 (OP-TEE), HW_CONFIG (U-Boot
device tree) and BL33 (U-Boot).

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: Ic79429c3bd4516c339f91a10e0b3f2828bf6c392
2 files changed