fix error 'undefined reference to entry' after menuconfig

bsp/stm32/stm32l4r5-st-nucleo/board/Kconfig

@@ -3,6 +3,8 @@ menu "Hardware Drivers Config"
     config SOC_STM32L4R5ZI
         bool
         select SOC_SERIES_STM32L4
+        select RT_USING_COMPONENTS_INIT
+        select RT_USING_USER_MAIN
         default y
 
     menu "Onboard Peripheral Drivers"