feat(stm32mp2-fdts): add BL31 info in fw-config

Add BL31 load address (beginning on SYSRAM) and size in fw-config DT
file.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
Change-Id: I2fcd8d326f394090401ac59b47216d59d3e911bc
1 file changed