docs(stm32mp1): fix FIP command with OP-TEE

When building a FIP with OP-TEE as BL32 on STM32MP1, AARCH32_SP=optee
has to be added to the make command.

Change-Id: I900c01957fe4ed7ed13ca955edd91ed1c5c5c4fa
Signed-off-by: Yann Gautier <yann.gautier@st.com>
1 file changed