[media] msi3101: remove unused variable assignment

Coverity CID 1196508: Unused pointer value (UNUSED_VALUE)
Pointer "bandwidth" returned by "v4l2_ctrl_find(&s->hdl, 10619148U)"
is overwritten.

Reported-by: <scan-admin@coverity.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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

@@ -913,7 +913,6 @@ static int msi3101_set_usb_adc(struct msi3101_state *s)
 
 	/* set tuner, subdev, filters according to sampling rate */
 	bandwidth_auto = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
-	bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 	if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 		bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 		v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);