[media] xc5000: Add support for 7MHz bandwidth for DVB-C/DVB-T

While xc5000 supports 7MHz bandwidth, the driver were lacking the code
implementing this feature, causing tuning issues with VHF chanels
used in Countries like Italy.

After this patch:

>>> tune to: 177500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
0x0000 0x0d49: pmt_pid 0x0102 RAI -- Rai 1 (running)
0x0000 0x0d4a: pmt_pid 0x0101 RAI -- Rai 2 (running)
0x0000 0x0d4b: pmt_pid 0x0100 RAI -- Rai 3 TGR Veneto (running)
0x0000 0x0d53: pmt_pid 0x0118 RAI -- Rai News (running)
0x0000 0x0d54: pmt_pid 0x0119 Rai -- Rai 3 TGR Emilia Romagna (running)
0x0000 0x0d4c: pmt_pid 0x0103 Rai -- Rai Radio1 (running)
0x0000 0x0d4d: pmt_pid 0x0104 Rai -- Rai Radio2 (running)
0x0000 0x0d4e: pmt_pid 0x0105 Rai -- Rai Radio3 (running)
Network Name 'Rai'

Tested-by: Eddi De Pieri <eddi@depieri.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/xc5000.c

@@ -676,8 +676,10 @@ static int xc5000_set_params(struct dvb_frontend *fe,
 			priv->freq_hz = params->frequency - 1750000;
 			break;
 		case BANDWIDTH_7_MHZ:
-			printk(KERN_ERR "xc5000 bandwidth 7MHz not supported\n");
-			return -EINVAL;
+			priv->bandwidth = BANDWIDTH_7_MHZ;
+			priv->video_standard = DTV7;
+			priv->freq_hz = params->frequency - 2250000;
+			break;
 		case BANDWIDTH_8_MHZ:
 			priv->bandwidth = BANDWIDTH_8_MHZ;
 			priv->video_standard = DTV8;
@@ -715,6 +717,10 @@ static int xc5000_set_params(struct dvb_frontend *fe,
 				priv->bandwidth = BANDWIDTH_6_MHZ;
 				priv->video_standard = DTV6;
 				priv->freq_hz = params->frequency - 1750000;
+			} else if (bw <= 7000000) {
+				priv->bandwidth = BANDWIDTH_7_MHZ;
+				priv->video_standard = DTV7;
+				priv->freq_hz = params->frequency - 2250000;
 			} else {
 				priv->bandwidth = BANDWIDTH_8_MHZ;
 				priv->video_standard = DTV7_8;