configs: stm32mp15: enable ADC

Enable ADC on stm32mp15.
- CONFIG_CMD_ADC
- CONFIG_STM32_ADC
Signed-off-by: NFabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

configs/stm32mp15_basic_defconfig

@@ -18,6 +18,7 @@ CONFIG_SYS_PROMPT="STM32MP> "
 # CONFIG_CMD_EXPORTENV is not set
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_ADC=y
 CONFIG_CMD_FUSE=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
@@ -27,6 +28,7 @@ CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_EXT4_WRITE=y
 # CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_STM32_ADC=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_STM32F7=y
 CONFIG_DM_MMC=y