platform-drivers-x86: intel_pmic_gpio: Fix off-by-one valid offset range check

Only pin 0-7 support input, so the valid offset range should be 0 ~ 7.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/intel_pmic_gpio.c

@@ -91,7 +91,7 @@ static void pmic_program_irqtype(int gpio, int type)
 
 static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 {
-	if (offset > 8) {
+	if (offset >= 8) {
 		pr_err("only pin 0-7 support input\n");
 		return -1;/* we only have 8 GPIO can use as input */
 	}
@@ -130,7 +130,7 @@ static int pmic_gpio_get(struct gpio_chip *chip, unsigned offset)
 	int ret;
 
 	/* we only have 8 GPIO pins we can use as input */
-	if (offset > 8)
+	if (offset >= 8)
 		return -EOPNOTSUPP;
 	ret = intel_scu_ipc_ioread8(GPIO0 + offset, &r);
 	if (ret < 0)