Structures passed to subdev pad operations are all zero-initialized when declaring variables. In most cases, this is done with designated initializers to initialize some of the fields to specific values, but in a minority of cases the structures are zero-initialized by assigning them to '{ 0 }' or '{ }'. Improve coding style consistency by using designated initializers where possible, always initializing the 'which' field. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>