V4L/DVB (11367): v4l2-common: remove legacy code

Now that all drivers are converted to v4l2_subdev we can remove legacy code
in v4l2-common. Also move the documentation of the internal API to
v4l2-subdev.h where it really belongs.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 1da8cb8..f23a774 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -739,33 +739,8 @@
 
 /* ----------------------------------------------------------------- */
 
-/* Helper function for I2C legacy drivers */
+/* I2C Helper functions */
 
-int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
-		const char *name,
-		int (*probe)(struct i2c_client *, const struct i2c_device_id *))
-{
-	struct i2c_client *client;
-	int err;
-
-	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
-	if (!client)
-		return -ENOMEM;
-
-	client->addr = address;
-	client->adapter = adapter;
-	client->driver = driver;
-	strlcpy(client->name, name, sizeof(client->name));
-
-	err = probe(client, NULL);
-	if (err == 0) {
-		i2c_attach_client(client);
-	} else {
-		kfree(client);
-	}
-	return err != -ENOMEM ? 0 : err;
-}
-EXPORT_SYMBOL(v4l2_i2c_attach);
 
 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 		const struct v4l2_subdev_ops *ops)