gpio: omap: simplify omap_gpio_get_direction()

Architectures are single-copy atomic, which means that simply reading
a register is an inherently atomic operation.  There is no need to
take a spinlock here.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-omap.c

@@ -953,17 +953,10 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
 
 static int omap_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
-	struct gpio_bank *bank;
-	unsigned long flags;
-	void __iomem *reg;
-	int dir;
+	struct gpio_bank *bank = gpiochip_get_data(chip);
 
-	bank = gpiochip_get_data(chip);
-	reg = bank->base + bank->regs->direction;
-	raw_spin_lock_irqsave(&bank->lock, flags);
-	dir = !!(readl_relaxed(reg) & BIT(offset));
-	raw_spin_unlock_irqrestore(&bank->lock, flags);
-	return dir;
+	return !!(readl_relaxed(bank->base + bank->regs->direction) &
+		  BIT(offset));
 }
 
 static int omap_gpio_input(struct gpio_chip *chip, unsigned offset)