ARM: configs: multi_v7: add stm32 support

This patch adds stm32 support to multi_v7_defconfig
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/configs/multi_v7_defconfig

@@ -80,6 +80,7 @@ CONFIG_ARCH_SPEAR13XX=y
 CONFIG_MACH_SPEAR1310=y
 CONFIG_MACH_SPEAR1340=y
 CONFIG_ARCH_STI=y
+CONFIG_ARCH_STM32=y
 CONFIG_ARCH_EXYNOS=y
 CONFIG_EXYNOS5420_MCPM=y
 CONFIG_ARCH_RENESAS=y
@@ -351,6 +352,8 @@ CONFIG_SERIAL_CONEXANT_DIGICOLOR=y
 CONFIG_SERIAL_CONEXANT_DIGICOLOR_CONSOLE=y
 CONFIG_SERIAL_ST_ASC=y
 CONFIG_SERIAL_ST_ASC_CONSOLE=y
+CONFIG_SERIAL_STM32=y
+CONFIG_SERIAL_STM32_CONSOLE=y
 CONFIG_HVC_DRIVER=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_I2C_CHARDEV=y