media: zd1301_demod: don't check retval after our own assignemt

No need to check a retval after we assigned a constant to it.

Signed-off-by: Wolfram Sang <[e-mail]>
Reviewed-by: Kieran Bingham <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb-frontends/zd1301_demod.c

···
 	} else {
 		dev_dbg(&pdev->dev, "unknown msg[0].len=%u\n", msg[0].len);
 		ret = -EOPNOTSUPP;
-		if (ret)
-			goto err;
+		goto err;
 	}
 
 	return num;