There are already two very similar recipes using uimage_padhdr in ramips target, and a third one is about to be added. Make the recipe more generic, so redefinitions are not necessary anymore. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Tested-by: Bjørn Mork <bjorn@mork.no> [Zyxel WAP6805]