V4L/DVB (7978): cx18: explicitly test for XC2028 tuner

Testing whether xceive_pin is non-zero is not good enough as 0 is a valid
value. Instead explicitly test whether the Xceive tuner is used.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx18/cx18-gpio.c

@@ -62,7 +62,7 @@ void cx18_gpio_init(struct cx18 *cx)
 	cx->gpio_dir = cx->card->gpio_init.direction;
 	cx->gpio_val = cx->card->gpio_init.initial_value;
 
-	if (cx->card->xceive_pin) {
+	if (cx->card->tuners[0].tuner == TUNER_XC2028) {
 		cx->gpio_dir |= 1 << cx->card->xceive_pin;
 		cx->gpio_val |= 1 << cx->card->xceive_pin;
 	}