[media] v4l: Support s_crop and g_crop through s/g_selection
Fall back to s_selection if s_crop isn't implemented by a driver. Same for g_selection / g_crop. Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi> Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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