gpio: tangier: use EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS() helper

Use EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS() helper to export pm_ops to
GPIO_TANGIER namespace, so that they can be reused.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Link: https://lore.kernel.org/r/20231113131600.10828-2-raag.jadav@intel.com


Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>