[media] dvb_usb_v2: move I2C adapter code to different file

/* dvb-usb-i2c.c is part of the DVB USB library.

 *

 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)

 * see dvb-usb-init.c for copyright information.

 *

 * This file contains functions for (de-)initializing an I2C adapter.

 */

#include "dvb_usb_common.h"

int dvb_usb_i2c_init(struct dvb_usb_device *d)

{

	int ret = 0;

	if (!d->props.i2c_algo)

		return 0;

	strlcpy(d->i2c_adap.name, d->name, sizeof(d->i2c_adap.name));

	d->i2c_adap.algo      = d->props.i2c_algo;

	d->i2c_adap.algo_data = NULL;

	d->i2c_adap.dev.parent = &d->udev->dev;

	i2c_set_adapdata(&d->i2c_adap, d);

	ret = i2c_add_adapter(&d->i2c_adap);

	if (ret < 0)

		pr_err("%s: could not add i2c adapter", KBUILD_MODNAME);

	d->state |= DVB_USB_STATE_I2C;

	return ret;

}

int dvb_usb_i2c_exit(struct dvb_usb_device *d)

{

	if (d->state & DVB_USB_STATE_I2C)

		i2c_del_adapter(&d->i2c_adap);

	d->state &= ~DVB_USB_STATE_I2C;

	return 0;

}

	return ret;

}

int dvb_usb_i2c_init(struct dvb_usb_device *d)

{

	int ret = 0;

	if (!d->props.i2c_algo)

		return 0;

	strlcpy(d->i2c_adap.name, d->name, sizeof(d->i2c_adap.name));

	d->i2c_adap.algo = d->props.i2c_algo;

	d->i2c_adap.algo_data = NULL;

	d->i2c_adap.dev.parent = &d->udev->dev;

	i2c_set_adapdata(&d->i2c_adap, d);

	ret = i2c_add_adapter(&d->i2c_adap);

	if (ret < 0)

		pr_err("%s: could not add i2c adapter", KBUILD_MODNAME);

	d->state |= DVB_USB_STATE_I2C;

	return ret;

}

int dvb_usb_i2c_exit(struct dvb_usb_device *d)

{

	if (d->state & DVB_USB_STATE_I2C)

		i2c_del_adapter(&d->i2c_adap);

	d->state &= ~DVB_USB_STATE_I2C;

	return 0;

}

static int dvb_usb_adapter_init(struct dvb_usb_device *d)

{

	struct dvb_usb_adapter *adap;