[media] si2157: Use name si2157_ops instead of si2157_tuner_ops

The struct prototype is defined at the beginning of the code as
"si2157_ops" but the real struct is called "si2157_tuner_ops".

This is causing the name to be empty on this info msg: si2157 16-0060:
si2157: found a '' in cold state

[crope@iki.fi: commit msg from Luis email reply]
Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Cc: Luis Alves <ljalvs@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/tuners/si2157.c

@@ -277,7 +277,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
 	return ret;
 }
 
-static const struct dvb_tuner_ops si2157_tuner_ops = {
+static const struct dvb_tuner_ops si2157_ops = {
 	.info = {
 		.name           = "Silicon Labs Si2157/Si2158",
 		.frequency_min  = 110000000,
@@ -317,7 +317,7 @@ static int si2157_probe(struct i2c_client *client,
 		goto err;
 
 	fe->tuner_priv = s;
-	memcpy(&fe->ops.tuner_ops, &si2157_tuner_ops,
+	memcpy(&fe->ops.tuner_ops, &si2157_ops,
 			sizeof(struct dvb_tuner_ops));
 
 	i2c_set_clientdata(client, s);