image: define DEVICE_DTS_DELIMITER as per-device variable

DEVICE_DTS_DELIMITER needs to be in the DEFAULT_DEVICE_VARS
list to work as expected. This was missing from the original
version and got overlooked.

Fixes: fd67908 ("scripts: mkits.sh: Allow legacy @ mode for dts creation")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

include/image.mk

@@ -394,6 +394,7 @@ define Device/Init
 
   DEVICE_DTS :=
   DEVICE_DTS_CONFIG :=
+  DEVICE_DTS_DELIMITER :=
   DEVICE_DTS_DIR :=
   DEVICE_DTS_OVERLAY :=
   DEVICE_FDT_NUM :=
@@ -419,8 +420,8 @@ DEFAULT_DEVICE_VARS := \
   DEVICE_NAME KERNEL KERNEL_INITRAMFS KERNEL_INITRAMFS_IMAGE KERNEL_SIZE \
   CMDLINE UBOOTENV_IN_UBI KERNEL_IN_UBI BLOCKSIZE PAGESIZE SUBPAGESIZE \
   VID_HDR_OFFSET UBINIZE_OPTS UBINIZE_PARTS MKUBIFS_OPTS DEVICE_DTS \
-  DEVICE_DTS_CONFIG DEVICE_DTS_DIR DEVICE_DTS_OVERLAY DEVICE_FDT_NUM \
-  DEVICE_IMG_PREFIX SOC BOARD_NAME UIMAGE_MAGIC UIMAGE_NAME \
+  DEVICE_DTS_CONFIG DEVICE_DTS_DELIMITER DEVICE_DTS_DIR DEVICE_DTS_OVERLAY \
+  DEVICE_FDT_NUM DEVICE_IMG_PREFIX SOC BOARD_NAME UIMAGE_MAGIC UIMAGE_NAME \
   SUPPORTED_DEVICES IMAGE_METADATA KERNEL_ENTRY KERNEL_LOADADDR \
   UBOOT_PATH IMAGE_SIZE \
   DEVICE_PACKAGES DEVICE_COMPAT_VERSION DEVICE_COMPAT_MESSAGE \