feat(stm32mp2-fdts): update STM32MP257F-EV1 DT

Add include for DDR configuration, and reference to OTP storing the
board ID.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: Ie2d5272ecf1dac77b91b2c148ec4dc1fb7b76631
1 file changed