feat(stm32mp2): add console configuration

Use UART driver and fill helpers for crash console.
Add early console setup in bl2_el3_early_platform_setup().

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: Ifb39554214dec05dafe4e306f8754e1454cdab61
diff --git a/plat/st/stm32mp2/platform.mk b/plat/st/stm32mp2/platform.mk
index f66612b..ba6ab4b 100644
--- a/plat/st/stm32mp2/platform.mk
+++ b/plat/st/stm32mp2/platform.mk
@@ -34,7 +34,7 @@
 PLAT_INCLUDES			+=	-Iplat/st/stm32mp2/include/
 
 PLAT_BL_COMMON_SOURCES		+=	lib/cpus/${ARCH}/cortex_a35.S
-
+PLAT_BL_COMMON_SOURCES		+=	drivers/st/uart/${ARCH}/stm32_console.S
 PLAT_BL_COMMON_SOURCES		+=	plat/st/stm32mp2/${ARCH}/stm32mp2_helper.S
 
 BL2_SOURCES			+=	plat/st/stm32mp2/plat_bl2_mem_params_desc.c