gpio-lynxpoint: force gpio_get() to return "1" and "0" only

Don't return the IN_LVL_BIT directly, a high gpio line returned
value "1073741824" intestead of "1" because IN_LVL_BIT is BIT(30)
Tested-by: NJerome Blin <jerome.blin@intel.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-lynxpoint.c

@@ -188,7 +188,7 @@ static int lp_irq_type(struct irq_data *d, unsigned type)
 static int lp_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
 	unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
-	return inl(reg) & IN_LVL_BIT;
+	return !!(inl(reg) & IN_LVL_BIT);
 }
 
 static void lp_gpio_set(struct gpio_chip *chip, unsigned offset, int value)