refactor(stm32mp1): remove authentication using STM32 image mode

Remove deprecated authentication mode to use the FIP authentication
based on TBBR requirements. It will use the new crypto library.

Change-Id: I95c7baa64ba42c370ae136f59781f2a7a4c7f507
Signed-off-by: Lionel Debieve <lionel.debieve@foss.st.com>
7 files changed