iio:accel:bmi088: Move exports into IIO_BMI088 namespace

To avoid unnecessary pollution of the global symbol namespace move the
driver core exports into their own namespace and import that into the two
bus modules.

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

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

drivers/iio/accel/bmi088-accel-core.c

···
 	.volatile_table = &bmi088_volatile_table,
 	.cache_type = REGCACHE_RBTREE,
 };
-EXPORT_SYMBOL_GPL(bmi088_regmap_conf);
+EXPORT_SYMBOL_NS_GPL(bmi088_regmap_conf, IIO_BMI088);
 
 static int bmi088_accel_power_up(struct bmi088_accel_data *data)
 {
···
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(bmi088_accel_core_probe);
+EXPORT_SYMBOL_NS_GPL(bmi088_accel_core_probe, IIO_BMI088);
 
 
 void bmi088_accel_core_remove(struct device *dev)
···
 	pm_runtime_set_suspended(dev);
 	bmi088_accel_power_down(data);
 }
-EXPORT_SYMBOL_GPL(bmi088_accel_core_remove);
+EXPORT_SYMBOL_NS_GPL(bmi088_accel_core_remove, IIO_BMI088);
 
 static int __maybe_unused bmi088_accel_runtime_suspend(struct device *dev)
 {
···
 	SET_RUNTIME_PM_OPS(bmi088_accel_runtime_suspend,
 			   bmi088_accel_runtime_resume, NULL)
 };
-EXPORT_SYMBOL_GPL(bmi088_accel_pm_ops);
+EXPORT_SYMBOL_NS_GPL(bmi088_accel_pm_ops, IIO_BMI088);
 
 MODULE_AUTHOR("Niek van Agt <[e-mail]>");
 MODULE_LICENSE("GPL v2");

drivers/iio/accel/bmi088-accel-spi.c

···
 MODULE_AUTHOR("Niek van Agt <[e-mail]>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");
+MODULE_IMPORT_NS(IIO_BMI088);