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: Jerome Blin <[e-mail]>
Signed-off-by: Mathias Nyman <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-lynxpoint.c

···
 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)