build: Allow to change the FIT config section name

Some devices only boot when a special config is found in the image and
completely ignore the default entry during the selection. These devices can
now use the variable DEVICE_DTS_CONFIG in their device image definition.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

include/image-commands.mk

@@ -118,6 +118,7 @@ define Build/fit
 		-D $(DEVICE_NAME) -o $@.its -k $@ \
 		$(if $(word 2,$(1)),-d $(word 2,$(1))) -C $(word 1,$(1)) \
 		-a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
+		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config@1") \
 		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
 	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
 	@mv $@.new $@

include/image.mk

@@ -140,6 +140,7 @@ endef
 define Image/BuildKernel/MkFIT
 	$(TOPDIR)/scripts/mkits.sh \
 		-D $(1) -o $(KDIR)/fit-$(1).its -k $(2) $(if $(3),-d $(3)) -C $(4) -a $(5) -e $(6) \
+		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config@1") \
 		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
 	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $(KDIR)/fit-$(1).its $(KDIR)/fit-$(1)$(7).itb
 endef
@@ -347,6 +348,7 @@ define Device/Init
   FS_OPTIONS/ubifs = $$(MKUBIFS_OPTS)
 
   DEVICE_DTS :=
+  DEVICE_DTS_CONFIG :=
   DEVICE_DTS_DIR :=
 
   BOARD_NAME :=
@@ -359,8 +361,8 @@ endef
 
 DEFAULT_DEVICE_VARS := \
   DEVICE_NAME KERNEL KERNEL_INITRAMFS KERNEL_SIZE KERNEL_INITRAMFS_IMAGE \
-  KERNEL_LOADADDR DEVICE_DTS DEVICE_DTS_DIR BOARD_NAME CMDLINE \
-  UBOOTENV_IN_UBI KERNEL_IN_UBI \
+  KERNEL_LOADADDR DEVICE_DTS DEVICE_DTS_CONFIG DEVICE_DTS_DIR BOARD_NAME \
+  CMDLINE UBOOTENV_IN_UBI KERNEL_IN_UBI \
   BLOCKSIZE PAGESIZE SUBPAGESIZE VID_HDR_OFFSET \
   UBINIZE_OPTS UIMAGE_NAME UBINIZE_PARTS \
   SUPPORTED_DEVICES IMAGE_METADATA