bcm63xx: ad1018: remove cfe.bin image support

Apparently, Sercomm allows loading a BCM WFI image via CFE, but this image
destroys "serial" and "protect" nand partitions, which is wrong.
It will also set both bootflags to the same value, which causes booting
issues with cferam (cferom will alternatively boot from cferam1 or cferam2
each time the device is rebooted).
Now that OEM Sercomm images are supported it's time to remove this hacky
cfe.bin image support.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/bcm63xx/image/Makefile

@@ -96,31 +96,6 @@ define Image/FileSystemStrip
 $(firstword $(subst +,$(space),$(subst root.,,$(notdir $(1)))))
 endef
 
-define Build/ad1018-jffs2-cferam
-	mv $@ $@.kernel
-
-	rm -rf $@-cferam
-	mkdir -p $@-cferam
-
-	# CFE RAM JFFS2 partition
-	cp $(KDIR)/bcm63xx-cfe/$(CFE_RAM_FILE) $@-cferam/$(CFE_RAM_JFFS2_NAME)
-	$(call Build/cfe-jffs2,$@-cferam)
-	mv $@ $@.cferam
-
-	# First block of CFE RAM 1 will be destroyed by MMAP
-	dd if=$@.cferam bs=$(BLOCKSIZE) count=1 > $@
-	dd if=$@.cferam >> $@
-	$(call Build/pad-to,896k)
-
-	# CFE RAM 2
-	dd if=$@.cferam >> $@
-
-	# Append kernel @ 4M
-	$(call Build/pad-to,4096k)
-	dd if=$@.kernel >> $@
-	rm -f $@.kernel
-endef
-
 define Build/cfe-bin
 	$(STAGING_DIR_HOST)/bin/imagetag -i $(IMAGE_KERNEL) -f $(IMAGE_ROOTFS) \
 		--output $@ --boardid $(CFE_BOARD_ID) --chipid $(CHIP_ID) \

target/linux/bcm63xx/image/bcm63xx_nand.mk

@@ -39,7 +39,7 @@ endef
 
 define Device/sercomm-nand
   $(Device/bcm63xx-nand)
-  IMAGES += factory.img
+  IMAGES = factory.img sysupgrade.bin
   IMAGE/factory.img := append-kernel | pad-to $$$$(KERNEL_SIZE) | append-ubi | cfe-sercomm-part | gzip | cfe-sercomm-load | cfe-sercomm-crypto
   SERCOM_PID :=
   SERCOMM_VERSION :=
@@ -125,7 +125,6 @@ TARGET_DEVICES += netgear_dgnd3700-v2
 ### Sercomm ###
 define Device/sercomm_ad1018
   $(Device/sercomm-nand)
-  IMAGE/cfe.bin := append-kernel | pad-to $$$$(KERNEL_SIZE) | ad1018-jffs2-cferam | append-ubi | cfe-wfi-tag
   DEVICE_VENDOR := Sercomm
   DEVICE_MODEL := AD1018
   CHIP_ID := 6328