linux: remove modules initscripts, port modules load to systemd

Signed-off-by: Stephan Raue <stephan@openelec.tv>
atvclient: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
atvclient: convert to systemd support

Signed-off-by: Stephan Raue <stephan@openelec.tv>
timezone-data: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>