mfd: intel_soc_pmic: Ensure GPIO irq is set to input pin

Surely GPIO irq will be used as an input pin so make sure its direction is
set after requesting.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/intel_soc_pmic_core.c

@@ -31,7 +31,7 @@ static int intel_soc_pmic_find_gpio_irq(struct device *dev)
 	struct gpio_desc *desc;
 	int irq;
 
-	desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0);
+	desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0, GPIOD_IN);
 	if (IS_ERR(desc))
 		return PTR_ERR(desc);