cx23885: Fix tuning regression for TeVii S471

When tuning to 10818V on Astra 28E2, the system tunes to 11343V instead. This is a regression in the S471 driver introduced with the
changeset: b43ea8068d2090cb1e44632c8a938ab40d2c7419 [media] cx23885:
Fix TeVii S471 regression since introduction of ts2020.

b/drivers/media/pci/cx23885/cx23885-dvb.c index 0549205..4be01b3 100644

@@ -473,6 +473,7 @@ static struct ds3000_config tevii_ds3000_config = {
 static struct ts2020_config tevii_ts2020_config  = {
        .tuner_address = 0x60,
        .clk_out_div = 1,
+       .frequency_div = 1146000,
 };
 
 static struct cx24116_config dvbworld_cx24116_config = {

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