The sysupgrade-tar image build is not defined for this target, do not add a build instruction for it. The build system will use the definition from the dna_valokuitu-plus-ex400 board and the build will fail. This fixes the build of the ramips target. Fixes:665c2154ef("ramips: add basic support for tp-link er605-v2") Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit746e894877)