mvebu: rework ClearFog bundle.tar.gz generation

Instead of introducing a fake filesystem type, move the tar generation step
directly into the image build step.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

target/linux/mvebu/image/Makefile

@@ -14,22 +14,18 @@ KERNEL_LOADADDR := 0x00008000
 
 DEVICE_VARS += KERNEL_SIZE
 
-define Image/mkfs/bundle
-	$(TAR) -cp --numeric-owner --owner=0 --group=0 --sort=name \
-		$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
-		-C $(call mkfs_target_dir,$(1))/ . > $@
-endef
-TARGET_FILESYSTEMS += bundle
-
 define Build/dtb
         $(call Image/BuildDTB,$(DTS_DIR)/$(DEVICE_DTS).dts,$@.dtb)
 endef
 
 define Build/clearfog-bundle
-	cp $(IMAGE_ROOTFS) $@.new
+	rm -f $@.new
+	$(TAR) -cp --numeric-owner --owner=0 --group=0 --sort=name \
+		$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
+		--file=$@.new -C $(TARGET_DIR)/ .
 	$(TAR) -rp --numeric-owner --owner=0 --group=0 --sort=name \
 		$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
-		--file=$@.new -C $(dir $(IMAGE_KERNEL))/ $(notdir $(IMAGE_KERNEL)) $(notdir $(IMAGE_KERNEL).dtb)
+		--file=$@.new -C $(dir $(IMAGE_KERNEL)) $(notdir $(IMAGE_KERNEL)) $(notdir $(IMAGE_KERNEL).dtb)
 	gzip -9n -c $@.new > $@
 endef
 
@@ -40,7 +36,6 @@ define Device/Default
   BOARD_NAME = $$(DEVICE_DTS)
   KERNEL_NAME := zImage
   KERNEL := kernel-bin | append-dtb | uImage none
-  FILESYSTEMS = $(filter-out bundle,$(TARGET_FILESYSTEMS))
 endef
 
 define Device/UBI
@@ -155,9 +150,8 @@ define Device/armada-388-clearfog
   KERNEL_INSTALL := 1
   KERNEL := dtb | kernel-bin
   DEVICE_TITLE := SolidRun ClearFog
-  FILESYSTEMS := bundle
   IMAGES := bundle.tar.gz
-  IMAGE/bundle.tar.gz := append-rootfs | clearfog-bundle
+  IMAGE/bundle.tar.gz := clearfog-bundle
   IMAGE_NAME = $$(IMAGE_PREFIX)-$$(2)
 endef
 TARGET_DEVICES += armada-388-clearfog