gpiolib: acpi: Correct kernel doc of struct acpi_gpio_event

The checker complains during build

gpiolib-acpi.c:45: warning: Function parameter or member 'irq_requested' not described in 'acpi_gpio_event'

because the typo in the field description.

Fix the name to have documentation up-to-date.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib-acpi.c

@@ -29,7 +29,7 @@
  * @irq:	  Linux IRQ number for the event, for request_ / free_irq
  * @irqflags:     flags to pass to request_irq when requesting the IRQ
  * @irq_is_wake:  If the ACPI flags indicate the IRQ is a wakeup source
- * @is_requested: True if request_irq has been done
+ * @irq_requested:True if request_irq has been done
  * @desc:	  gpio_desc for the GPIO pin for this event
  */
 struct acpi_gpio_event {