iio:accel:kxsd9: Move exports into IIO_KDSD9 namespace

In order to avoid unnecessary pollution of the global symbol namespace
move the core kxsd9 functions into a kxsd9 specific namespace and import
that into the two bus modules.

For more information see https://lwn.net/Articles/760045/

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

drivers/iio/accel/kxsd9-i2c.c

···
 
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("KXSD9 accelerometer I2C interface");
+MODULE_IMPORT_NS(IIO_KXSD9);

drivers/iio/accel/kxsd9-spi.c

···
 MODULE_AUTHOR("Jonathan Cameron <[e-mail]>");
 MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_KXSD9);

drivers/iio/accel/kxsd9.c

···
 
 	return ret;
 }
-EXPORT_SYMBOL(kxsd9_common_probe);
+EXPORT_SYMBOL_NS(kxsd9_common_probe, IIO_KXSD9);
 
 void kxsd9_common_remove(struct device *dev)
 {
···
 	pm_runtime_disable(dev);
 	kxsd9_power_down(st);
 }
-EXPORT_SYMBOL(kxsd9_common_remove);
+EXPORT_SYMBOL_NS(kxsd9_common_remove, IIO_KXSD9);
 
 #ifdef CONFIG_PM
 static int kxsd9_runtime_suspend(struct device *dev)
···
 	SET_RUNTIME_PM_OPS(kxsd9_runtime_suspend,
 			   kxsd9_runtime_resume, NULL)
 };
-EXPORT_SYMBOL(kxsd9_dev_pm_ops);
+EXPORT_SYMBOL_NS(kxsd9_dev_pm_ops, IIO_KXSD9);
 
 MODULE_AUTHOR("Jonathan Cameron <[e-mail]>");
 MODULE_DESCRIPTION("Kionix KXSD9 driver");