fix(stm32mp1): add bl prefix for internal linker script

Due to patch [1], the bl prefix was removed from the build macros.
It should then add explicitly when compiling stm32mp1.ld.S.

[1] 434d0491c5 ("refactor(makefile): remove BL prefixes in build macros")

Change-Id: I298dba2a7c958dd4ea6429c83ed4b1ee97e1735f
Signed-off-by: Yann Gautier <yann.gautier@st.com>
1 file changed