V4L/DVB (9433): Limit bandwidth with a 3dB response fall

In this case, we will be sure that there exists a carrier
and the center frequency would be simply f1 - f2. In such
a circumstance, the TR loop is simplified to doing a simple
check for timing, rather than searching for the same.
Signed-off-by: NArvo Jarve <arvo@softshark.ee>
Signed-off-by: NManu Abraham <manu@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/tda8261.c

@@ -102,7 +102,7 @@ static int tda8261_get_state(struct dvb_frontend *fe,
 		tstate->frequency = state->frequency;
 		break;
 	case DVBFE_TUNER_BANDWIDTH:
-		tstate->bandwidth = 60000000; /* FIXME! need to calculate Bandwidth */
+		tstate->bandwidth = 40000000; /* FIXME! need to calculate Bandwidth */
 		break;
 	default:
 		printk("%s: Unknown parameter (param=%d)\n", __func__, param);