[media] pt3: fix device identification

As warned by smatch:
	drivers/media/pci/pt3/pt3.c:398 pt3_attach_fe() error: strncmp() '"tc90522sat"' too small (11 vs 20)

Clearly, the logic is doing the wrong thing, as it is not comparing the strings
on the right way.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/pt3/pt3.c

@@ -395,7 +395,8 @@ static int pt3_attach_fe(struct pt3_board *pt3, int i)
 	if (!try_module_get(cl->dev.driver->owner))
 		goto err_demod_i2c_unregister_device;
 
-	if (!strncmp(cl->name, TC90522_I2C_DEV_SAT, sizeof(cl->name))) {
+	if (!strncmp(cl->name, TC90522_I2C_DEV_SAT,
+		     strlen(TC90522_I2C_DEV_SAT))) {
 		struct qm1d1c0042_config tcfg;
 
 		tcfg = adap_conf[i].tuner_cfg.qm1d1c0042;