Add a tuning script for raspberrypi for alsc only, that uses libtuning. Since there will also be a tuning script for raspberrypi that has more modules, put the libtuning alsc module definition in a separate file so that it can be reused later. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>