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 <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Andy Shevchenko <[e-mail]>

drivers/gpio/gpio-tangier.c

···
 #include <linux/math.h>
 #include <linux/module.h>
 #include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pm.h>
 #include <linux/spinlock.h>
 #include <linux/string_helpers.h>
 #include <linux/types.h>
···
 	return 0;
 }
 EXPORT_SYMBOL_NS_GPL(tng_gpio_resume, GPIO_TANGIER);
+
+EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS(tng_gpio_pm_ops, tng_gpio_suspend, tng_gpio_resume, GPIO_TANGIER);
 
 MODULE_AUTHOR("Andy Shevchenko <[e-mail]>");
 MODULE_AUTHOR("Pandith N <[e-mail]>");

drivers/gpio/gpio-tangier.h

···
 #define _GPIO_TANGIER_H_
 
 #include <linux/gpio/driver.h>
+#include <linux/pm.h>
 #include <linux/spinlock_types.h>
 #include <linux/types.h>
 
···
 
 int tng_gpio_suspend(struct device *dev);
 int tng_gpio_resume(struct device *dev);
+
+extern const struct dev_pm_ops tng_gpio_pm_ops;
 
 #endif /* _GPIO_TANGIER_H_ */