Use dev_dbg() to tell about the progress of the graph traversal algorithm.
This is intended to make debugging of the algorithm easier.
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>