pinctrl: ocelot: fix gpio direction

Bits have to be cleared in DEVCPU_GCB:GPIO:GPIO_OE for input and set for
output. ocelot_gpio_set_direction() got it wrong and this went unnoticed
when the driver was reworked.
Reported-by: Gregory Clement <gregory.clement@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ocelot.c

@@ -252,7 +252,7 @@ static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
 	struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 
 	regmap_update_bits(info->map, OCELOT_GPIO_OE, BIT(pin),
-			   input ? BIT(pin) : 0);
+			   input ? 0 : BIT(pin));
 
 	return 0;
 }