added dtb generation for stm32f769 target

Signed-off-by: Alexander Brand <tecnologic86@gmail.com>

target/arm/Makefile

@@ -188,6 +188,10 @@ endif
 ifeq ($(ADK_TARGET_SYSTEM_SOLIDRUN_CLEARFOG),y)
 	env $(KERNEL_MAKE_ENV) $(MAKE) -C "${LINUX_DIR}" $(KERNEL_MAKE_OPTS) \
 		armada-388-clearfog.dtb $(MAKE_TRACE)
+endif
+ifeq ($(ADK_TARGET_SYSTEM_ST_STM32F769),y)
+	env $(KERNEL_MAKE_ENV) $(MAKE) -C "${LINUX_DIR}" $(KERNEL_MAKE_OPTS) \
+		dtbs $(MAKE_TRACE)
 endif
 	for x in $(LINUX_DIR)/arch/arm/boot/dts/*.dtb; do \
 		[[ -e "$$x" ]] && cp $(LINUX_DIR)/arch/arm/boot/dts/*.dtb $(FW_DIR); \