openwrt: backport lede patch for tp-link images

Signed-off-by: Tim Niemeyer <tim@tn-x.org>
Reviewed-by: Jan Kraus <mayosemmel@gmail.com>
Tested-by: Tim Niemeyer <tim@tn-x.org>
Reviewed-by: Tobias Klaus <tk+ff@meskal.net>

build_patches/openwrt/0007-use-EU-code.patch

+diff --git target/linux/ar71xx/image/Makefile target/linux/ar71xx/image/Makefile
+index a8073f2..5f0df54 100644
+--- target/linux/ar71xx/image/Makefile
++++ target/linux/ar71xx/image/Makefile
+@@ -58,13 +58,14 @@ define Build/mktplinkfw
+ 		-o $@.new \
+ 		-j -X 0x40000 \
+ 		-a $(call rootfs_align,$(FILESYSTEM)) \
+-		$(if $(findstring sysupgrade,$1),-s) && mv $@.new $@ || rm -f $@
++		$(wordlist 2,$(words $(1)),$(1)) \
++		$(if $(findstring sysupgrade,$(word 1,$(1))),-s) && mv $@.new $@ || rm -f $@
+ endef
+ 
+ # -c combined image
+ define Build/mktplinkfw-initramfs
+ 	$(STAGING_DIR_HOST)/bin/mktplinkfw \
+-		-H $(TPLINK_HWID) -W $(TPLINK_HWREV) -F $(TPLINK_FLASHLAYOUT) -N OpenWrt -V $(REVISION) \
++		-H $(TPLINK_HWID) -W $(TPLINK_HWREV) -F $(TPLINK_FLASHLAYOUT) -N OpenWrt -V $(REVISION) $(1) \
+ 		-k $@ \
+ 		-o $@.new \
+ 		-s -S \