configs: stm32: move config flag from defconfig to Kconfig

Move system flags from defconfig to mach-stm32/Kconfig

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>
diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig
index f4c93f1..5f7a2b5 100644
--- a/arch/arm/mach-stm32/Kconfig
+++ b/arch/arm/mach-stm32/Kconfig
@@ -2,9 +2,31 @@
 
 config STM32F4
 	bool "stm32f4 family"
+	select CLK
+	select DM_GPIO
+	select DM_RESET
+	select MISC
+	select PINCTRL
+	select PINCTRL_STM32
+	select RAM
+	select STM32_SDRAM
+	select STM32_RCC
+	select STM32_RESET
+	select STM32_SERIAL
 
 config STM32F7
 	bool "stm32f7 family"
+	select CLK
+	select DM_GPIO
+	select DM_RESET
+	select MISC
+	select PINCTRL
+	select PINCTRL_STM32
+	select RAM
+	select STM32_SDRAM
+	select STM32_RCC
+	select STM32_RESET
+	select STM32_SERIAL
 	select SUPPORT_SPL
 	select SPL
 	select SPL_CLK