media: uvcvideo: Do not open code uvc_queue_get_current_buffer

media: uvcvideo: Do not open code uvc_queue_get_current_buffer

Do not re-implement uvc_queue_get_current_buffer() logic inside
uvc_video_complete(), just call the function.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://patch.msgid.link/20260417-uvc-meta-partial-v2-1-31d274af7d2d@chromium.org
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>