[media] saa7134-empress: add missing MPEG controls

Reported by, and based on a patch from, Martin Dauskardt.

The AUDIO_AC3_BITRATE control is still missing from this list, but such
optional controls are a bit hard to handle. This will be fixed automatically
when we switch to the control framework.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reported-by: Martin Dauskardt <martin.dauskardt@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7134/saa7134-empress.c

@@ -373,6 +373,10 @@ static int empress_queryctrl(struct file *file, void *priv,
 	static const u32 mpeg_ctrls[] = {
 		V4L2_CID_MPEG_CLASS,
 		V4L2_CID_MPEG_STREAM_TYPE,
+		V4L2_CID_MPEG_STREAM_PID_PMT,
+		V4L2_CID_MPEG_STREAM_PID_AUDIO,
+		V4L2_CID_MPEG_STREAM_PID_VIDEO,
+		V4L2_CID_MPEG_STREAM_PID_PCR,
 		V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 		V4L2_CID_MPEG_AUDIO_ENCODING,
 		V4L2_CID_MPEG_AUDIO_L2_BITRATE,