pinctrl/amd: fix typo

Fix spelling mistake: "lenght" -> "length"
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-amd.c

@@ -489,7 +489,7 @@ static int amd_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	/*
 	 * If WAKE_INT_MASTER_REG.MaskStsEn is set, a software write to the
 	 * debounce registers of any GPIO will block wake/interrupt status
-	 * generation for *all* GPIOs for a lenght of time that depends on
+	 * generation for *all* GPIOs for a length of time that depends on
 	 * WAKE_INT_MASTER_REG.MaskStsLength[11:0].  During this period the
 	 * INTERRUPT_ENABLE bit will read as 0.
 	 *