V4L/DVB (5360): Dvb-pll: Use sizeof() to get name length

Better to use sizeof() to get the size of the output buffer for the tuner
name, instead of just hard coding 128.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/frontends/dvb-pll.c

@@ -640,7 +640,8 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
 	memcpy(&fe->ops.tuner_ops, &dvb_pll_tuner_ops,
 	       sizeof(struct dvb_tuner_ops));
 
-	strncpy(fe->ops.tuner_ops.info.name, desc->name, 128);
+	strncpy(fe->ops.tuner_ops.info.name, desc->name,
+		sizeof(fe->ops.tuner_ops.info.name));
 	fe->ops.tuner_ops.info.frequency_min = desc->min;
 	fe->ops.tuner_ops.info.frequency_min = desc->max;