image-commands: fix generating out-of-tree DTO

Hack path so DTO generation works also for out-of-tree device tree
sources which currently fail.

Signed-off-by: Daniel Golle <[email protected]>

include/image-commands.mk

@@ -279,9 +279,11 @@ endef
 define Build/fit
 	$(TOPDIR)/scripts/mkits.sh \
 		-D $(DEVICE_NAME) -o [email protected] -k $@ \
-		-C $(word 1,$(1)) $(if $(word 2,$(1)),\
-		$(if $(DEVICE_DTS_OVERLAY),-d $(KERNEL_BUILD_DIR)/image-$$(basename $(word 2,$(1))),\
-			-d $(word 2,$(1)))) \
+		-C $(word 1,$(1)) \
+		$(if $(word 2,$(1)),\
+			$(if $(findstring 11,$(if $(DEVICE_DTS_OVERLAY),1)$(if $(findstring $(KERNEL_BUILD_DIR)/image-,$(word 2,$(1))),,1)), \
+				-d $(KERNEL_BUILD_DIR)/image-$$(basename $(word 2,$(1))), \
+				-d $(word 2,$(1)))) \
 		$(if $(findstring with-rootfs,$(word 3,$(1))),-r $(IMAGE_ROOTFS)) \
 		$(if $(findstring with-initrd,$(word 3,$(1))), \
 			$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE), \