ARM: configs: stm32: Enable MMC_ARMMMCI and EXT3_FS support

-Enable MMC_ARMMCI support to add SDIO support for
STM32F4 and STM32F7 SoCs family

-Enable EXT3_FS support to be able to read rootfs from MMC partition
formatted in EXT2/3/4

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/configs/stm32_defconfig

@@ -57,6 +57,8 @@ CONFIG_MFD_STMPE=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 # CONFIG_USB_SUPPORT is not set
+CONFIG_MMC=y
+CONFIG_MMC_ARMMMCI=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y
 CONFIG_LEDS_GPIO=y
@@ -71,6 +73,7 @@ CONFIG_STM32_MDMA=y
 CONFIG_IIO=y
 CONFIG_STM32_ADC_CORE=y
 CONFIG_STM32_ADC=y
+CONFIG_EXT3_FS=y
 # CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
 # CONFIG_INOTIFY_USER is not set