Add correct deps for knxd and wb-mqtt-knx build
Add correct deps for knxd and wb-mqtt-knx build

Previously packages were added to create_rootfs.sh,
but they should be added to prep.sh

contactless/wirenboard,contactless/wirenboard,contactless/wirenboard,contactless/wirenboard,contactless/wirenboard,contactless/wirenboard,contactless/wirenboard