feat(st): add FWU configurations

Test Firmware Update configurations (with PSA_FWU_SUPPORT=1).
Add one FWU config for STM32MP15 on SD-card.
To avoid adding too much configurations, update all STM32MP13 configs
to use FWU and change STM32MP15 boot on raw NAND to use it as well,
as there is some dedicated code for this use case.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I4deb3fe3ca79a45ac7b95c976f44fcd457d4872b
diff --git a/tf_config/stm32mp1-mp13-tbb b/tf_config/stm32mp1-mp13-tbb
index f8b295d..fd91f0c 100644
--- a/tf_config/stm32mp1-mp13-tbb
+++ b/tf_config/stm32mp1-mp13-tbb
@@ -2,9 +2,10 @@
 ARCH=aarch32
 ARM_ARCH_MAJOR=7
 CROSS_COMPILE=arm-none-eabi-
+DTB_FILE_NAME=stm32mp135f-dk.dtb
 PLAT=stm32mp1
+PSA_FWU_SUPPORT=1
 STM32MP13=1
 STM32MP_EMMC=1
 STM32MP_SDMMC=1
-DTB_FILE_NAME=stm32mp135f-dk.dtb
 TRUSTED_BOARD_BOOT=1