feat(stm32mp1): save boot auth status and partition info

Introduce a functionality for saving/restoring boot auth status
and partition used for booting (FSBL partition on which the boot
was successful).

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
Change-Id: I4d7f153b70dfc49dad8c1c3fa71111a350caf1ee
3 files changed