V4L/DVB (8777): tea575x-tuner: replace video_exclusive_open/release

Move the video_exclusive_open/release functionality into the
driver itself.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h
index b62ce3e..b6870cb 100644
--- a/include/sound/tea575x-tuner.h
+++ b/include/sound/tea575x-tuner.h
@@ -43,6 +43,7 @@
 	unsigned int freq_fixup;	/* crystal onboard */
 	unsigned int val;		/* hw value */
 	unsigned long freq;		/* frequency */
+	unsigned long in_use;		/* set if the device is in use */
 	struct snd_tea575x_ops *ops;
 	void *private_data;
 };