media: cec-gpio: use GPIOD_OUT_HIGH_OPEN_DRAIN

This driver needs a pull up output GPIO, but devm_gpiod_get() is called
with GPIOD_IN. This apparently works fine for the RPi3 where the DT
correctly specifies a pull up GPIO, but on the i.MX6 it also needs to
be specified with devm_gpiod_get().
Reported-by: NHenrik Mau <Henrik.Mau@linn.co.uk>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/cec-gpio/cec-gpio.c

@@ -158,7 +158,7 @@ static int cec_gpio_probe(struct platform_device *pdev)
 
 	cec->dev = dev;
 
-	cec->cec_gpio = devm_gpiod_get(dev, "cec", GPIOD_IN);
+	cec->cec_gpio = devm_gpiod_get(dev, "cec", GPIOD_OUT_HIGH_OPEN_DRAIN);
 	if (IS_ERR(cec->cec_gpio))
 		return PTR_ERR(cec->cec_gpio);
 	cec->cec_irq = gpiod_to_irq(cec->cec_gpio);