pinctrl: intel: Protect set wake flow by spin lock

It seems intel_gpio_irq_wake() misses lock protection against I/O flow.
Use spin lock here as well.

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>