[media] tea575x-tuner: update to latest V4L2 framework requirements

The tea575x-tuner module has been updated to use the latest V4L2 framework
functionality. This also required changes in the drivers that rely on it.

The tea575x changes are:

- The drivers must provide a v4l2_device struct to the tea module.
- The radio_nr module parameter must be part of the actual radio driver,
  and not of the tea module.
- Changed the frequency range to the normal 76-108 MHz range instead of
  50-150.
- Add hardware frequency seek support.
- Fix broken rxsubchans/audmode handling.
- The application can now select between stereo and mono.
- Support polling for control events.
- Add V4L2 priority handling.

And radio-sf16fmr2.c now uses the isa bus kernel framework.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Thanks-to: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/sound/tea575x-tuner.h

@@ -25,6 +25,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
 
 #define TEA575X_FMIF	10700
 
@@ -42,13 +43,16 @@ struct snd_tea575x_ops {
 };
 
 struct snd_tea575x {
+	struct v4l2_device *v4l2_dev;
 	struct video_device vd;		/* video device */
+	int radio_nr;			/* radio_nr */
 	bool tea5759;			/* 5759 chip is present */
+	bool cannot_read_data;		/* Device cannot read the data pin */
 	bool mute;			/* Device is muted? */
 	bool stereo;			/* receiving stereo */
 	bool tuned;			/* tuned to a station */
 	unsigned int val;		/* hw value */
-	unsigned long freq;		/* frequency */
+	u32 freq;			/* frequency */
 	struct mutex mutex;
 	struct snd_tea575x_ops *ops;
 	void *private_data;