ar71xx/image/edimax shorten the revision to 13 character

edimax fails if the revision is longer than 13 characters.
Also change the name from OpenWrt to LEDE

Signed-off-by: Alexander Couzens <[email protected]>

target/linux/ar71xx/image/legacy.mk

@@ -541,11 +541,11 @@ define Image/Build/Belkin
 	$(eval rootsize=$(call mtdpartsize,rootfs,$(4)))
 	$(call Sysupgrade/RKuImage,$(1),$(2),$(kernsize),$(rootsize))
 	if [ -e "$(call sysupname,$(1),$(2))" ]; then \
-		edimax_fw_header -m $(5) -v "OpenWrt$(REVISION)" \
+		edimax_fw_header -m $(5) -v "$(shell echo -n LEDE$(REVISION) | cut -c -13)" \
 			-n "uImage" \
 			-i $(KDIR_TMP)/vmlinux-$(2).uImage \
 			-o $(KDIR_TMP)/$(2)-uImage; \
-		edimax_fw_header -m $(5) -v "OpenWrt$(REVISION)" \
+		edimax_fw_header -m $(5) -v "$(shell echo -n LEDE$(REVISION) | cut -c -13)" \
 			-n "rootfs" \
 			-i $(KDIR)/root.$(1) \
 			-o $(KDIR_TMP)/$(2)-rootfs; \