ath79: replace custom uImageArcher generation

The replaces the custom uImageArcher build step with the generic uImage
build step. The only different between these two is the difference in
the generated name.

Tested on: TP-Link Archer C59 v1

Acked-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ath79/image/common-tp-link.mk

@@ -1,14 +1,6 @@
 DEVICE_VARS += TPLINK_HWID TPLINK_HWREV TPLINK_FLASHLAYOUT TPLINK_HEADER_VERSION
 DEVICE_VARS += TPLINK_BOARD_ID TPLINK_HWREVADD TPLINK_HVERSION
 
-define Build/uImageArcher
-	mkimage -A $(LINUX_KARCH) \
-		-O linux -T kernel -C $(1) -a $(KERNEL_LOADADDR) \
-		-e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
-		-n '$(call toupper,$(LINUX_KARCH)) OpenWrt Linux-$(LINUX_VERSION)' -d $@ $@.new
-	@mv $@.new $@
-endef
-
 define Device/tplink-v1
   DEVICE_VENDOR := TP-Link
   TPLINK_HWID := 0x0
@@ -88,7 +80,7 @@ endef
 
 define Device/tplink-safeloader-uimage
   $(Device/tplink-safeloader)
-  KERNEL := kernel-bin | append-dtb | lzma | uImageArcher lzma
+  KERNEL := kernel-bin | append-dtb | lzma | uImage lzma
   KERNEL_INITRAMFS := $$(KERNEL)
 endef