feat(st-reset): add stm32mp2_reset driver

This driver manages the resets of the peripherals embedded in STM32MP2.
Like clock driver, it also uses the RCC peripheral.

Change-Id: I8217891bdf1b847925aad77f3f6ef542f08d1fba
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/plat/st/stm32mp2/platform.mk b/plat/st/stm32mp2/platform.mk
index d9969dd..d9a4d79 100644
--- a/plat/st/stm32mp2/platform.mk
+++ b/plat/st/stm32mp2/platform.mk
@@ -51,7 +51,8 @@
 PLAT_BL_COMMON_SOURCES		+=	drivers/st/uart/${ARCH}/stm32_console.S
 PLAT_BL_COMMON_SOURCES		+=	plat/st/stm32mp2/${ARCH}/stm32mp2_helper.S
 
-PLAT_BL_COMMON_SOURCES		+=	drivers/st/bsec/bsec3.c
+PLAT_BL_COMMON_SOURCES		+=	drivers/st/bsec/bsec3.c					\
+					drivers/st/reset/stm32mp2_reset.c
 
 PLAT_BL_COMMON_SOURCES		+=	drivers/st/clk/clk-stm32-core.c				\
 					drivers/st/clk/clk-stm32mp2.c