V4L/DVB (7683): pvrusb2-dvb: set to DTV mode before attaching frontend

static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)

{

	struct pvr2_dvb_props *dvb_props = adap->pvr->hdw->hdw_desc->dvb_props;

	struct pvr2_hdw *hdw = adap->pvr->hdw;

	struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;

	int ret;

	if (dvb_props == NULL) {

		err("fe_props not defined!");

		return -EINVAL;

	}

	/* FIXME: This code should be moved into the core,

	 * and should only be called if we don't already have

	 * control of the bus.

	 *

	 * We can't call "pvr2_dvb_bus_ctrl(adap->fe, 1)" from here,

	 * because adap->fe isn't defined yet.

	 */

	ret = pvr2_ctrl_set_value(pvr2_hdw_get_ctrl_by_id(hdw,

							  PVR2_CID_INPUT),

				  PVR2_CVAL_INPUT_DTV);

	if (ret != 0)

		return ret;

	pvr2_hdw_commit_ctl(hdw);

	if (dvb_props->frontend_attach == NULL) {

		err("frontend_attach not defined!");

		return -EINVAL;