sysupgrade.bin has been added to IMAGES twice, resulting in
warnings like:
Makefile:86: warning: overriding recipe for target
'[...]/tmp/openwrt-ath79-generic-dlink_dap-2660-a1-squashfs-sysupgrade.bin'
Makefile:86: warning: ignoring old recipe for target
'[...]/tmp/openwrt-ath79-generic-dlink_dap-2660-a1-squashfs-sysupgrade.bin'
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: maurerr <mariusd84@gmail.com>