gpio: tegra: Include the right header

This is a GPIO driver so include only <linux/gpio/driver.h>.
Drop the use of GPIOF_* flags: these are for consumers, not
drivers. Just return 0/1.

Cc: Stefan Agner <stefan@agner.ch>
Cc: Thierry Reding <treding@nvidia.com>
Reviewed-by: NDmitry Osipenko <digetx@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-tegra.c

@@ -22,7 +22,7 @@
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
@@ -207,7 +207,7 @@ static int tegra_gpio_get_direction(struct gpio_chip *chip,
 
 	oe = tegra_gpio_readl(tgi, GPIO_OE(tgi, offset));
 
-	return (oe & pin_mask) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
+	return !(oe & pin_mask);
 }
 
 static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,