staging: bcm2835-camera: Correctly denote key frames in encoded data

Forward MMAL key frame flags to the V4L2 buffers.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c

@@ -376,6 +376,9 @@ static void buffer_cb(struct vchiq_mmal_instance *instance,
 			}
 
 			vb2_set_plane_payload(&buf->vb.vb2_buf, 0, length);
+			if (mmal_flags & MMAL_BUFFER_HEADER_FLAG_KEYFRAME)
+				buf->vb.flags |= V4L2_BUF_FLAG_KEYFRAME;
+
 			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 
 			if (mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS &&