refactor(stm32mp1): use a macro for header size

Use STM32MP_HEADER_RESERVED_SIZE macro instead of a fixed value 0x3000
in linker script.

Change-Id: I2702285c15aebaa1304a891c8aaabc949a912ba6
Signed-off-by: Yann Gautier <yann.gautier@st.com>
2 files changed