STM32L4: don't think these chips have DPFPU, DTCM or ITCM

arch/arm/src/stm32l4/Kconfig

@@ -61,6 +61,18 @@ endchoice # STM32 L4 Chip Selection
 # Chip families
 
 config STM32L4_STM32L4X3
+	bool
+	default n
+	select STM32L4_HAVE_USART1
+	select STM32L4_HAVE_USART2
+	select STM32L4_HAVE_USART3 if !(STM32L4_L432XX || STM32L4_L442XX)
+	select STM32L4_HAVE_LPTIM1
+	select STM32L4_HAVE_LPTIM2
+	select STM32L4_HAVE_COMP
+	select STM32L4_HAVE_SAI1
+	select STM32L4_HAVE_LCD if !(STM32L4_STM32L4X1 || STM32L4_STM32L4X2)
+
+config STM32L4_STM32L4X5
 	bool
 	default n
 	select STM32L4_HAVE_USART1

arch/arm/src/stm32l4/Make.defs

@@ -127,13 +127,6 @@ ifeq ($(CONFIG_BUILD_PROTECTED),y)
 CHIP_CSRCS += stm32l4_userspace.c stm32l4_mpuinit.c
 endif
 
-ifeq ($(CONFIG_ARMV7M_DTCM),y)
-CHIP_CSRCS += stm32l4_dtcm.c
-ifeq ($(CONFIG_STM32L4_DTCM_PROCFS),y)
-CHIP_CSRCS += stm32l4_procfs_dtcm.c
-endif
-endif
-
 ifeq ($(CONFIG_STM32L4_DMA),y)
 CHIP_CSRCS += stm32l4_dma.c
 endif