intel_pmic_gpio: fix off-by-one value range checking

In pmic_irq_type(), we use gpio as array index for trigger,
thus the valid value range for gpio should be 0 .. NUM_GPIO - 1.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

drivers/platform/x86/intel_pmic_gpio.c

@@ -197,7 +197,7 @@ static int pmic_irq_type(unsigned irq, unsigned type)
 	u32 gpio = irq - pg->irq_base;
 	unsigned long flags;
 
-	if (gpio > pg->chip.ngpio)
+	if (gpio >= pg->chip.ngpio)
 		return -EINVAL;
 
 	spin_lock_irqsave(&pg->irqtypes.lock, flags);