[media] msi3101: init bits 23:20 on PLL register

It is not sure what is meaning of that number, but it is better
to try do as Windows driver. It seems to have small effect for
signal when looking FM FFT.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/staging/media/msi3101/sdr-msi3101.c

@@ -1129,9 +1129,19 @@ static int msi3101_set_usb_adc(struct msi3101_state *s)
 	 *
 	 * VCO 202000000 - 720000000++
 	 */
-	reg3 = 0x01c00303;
+	reg3 = 0x01000303;
 	reg4 = 0x00000004;
 
+	/* XXX: Filters? AGC? */
+	if (f_sr < 6000000)
+		reg3 |= 0x1 << 20;
+	else if (f_sr < 7000000)
+		reg3 |= 0x5 << 20;
+	else if (f_sr < 8500000)
+		reg3 |= 0x9 << 20;
+	else
+		reg3 |= 0xd << 20;
+
 	for (div_r_out = 4; div_r_out < 16; div_r_out += 2) {
 		f_vco = f_sr * div_r_out * 12;
 		dev_dbg(&s->udev->dev, "%s: div_r_out=%d f_vco=%d\n",