iio:magnetometer:hmc5843: Move exports to IIO_HMC5843 namespace

In order to avoid unnecessary pollution of the global symbol namespace
move the common/library functions into a specific namespace and import
that into the bus specific device drivers that use them.

For more information see https://lwn.net/Articles/760045/Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220130205701.334592-15-jic23@kernel.org

drivers/iio/magnetometer/hmc5843_core.c

@@ -608,14 +608,14 @@ int hmc5843_common_suspend(struct device *dev)
 	return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
 				HMC5843_MODE_SLEEP);
 }
-EXPORT_SYMBOL(hmc5843_common_suspend);
+EXPORT_SYMBOL_NS(hmc5843_common_suspend, IIO_HMC5843);
 
 int hmc5843_common_resume(struct device *dev)
 {
 	return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
 		HMC5843_MODE_CONVERSION_CONTINUOUS);
 }
-EXPORT_SYMBOL(hmc5843_common_resume);
+EXPORT_SYMBOL_NS(hmc5843_common_resume, IIO_HMC5843);
 
 int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
 			 enum hmc5843_ids id, const char *name)
@@ -669,7 +669,7 @@ int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
 	hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
 	return ret;
 }
-EXPORT_SYMBOL(hmc5843_common_probe);
+EXPORT_SYMBOL_NS(hmc5843_common_probe, IIO_HMC5843);
 
 void hmc5843_common_remove(struct device *dev)
 {
@@ -681,7 +681,7 @@ void hmc5843_common_remove(struct device *dev)
 	/*  sleep mode to save power */
 	hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
 }
-EXPORT_SYMBOL(hmc5843_common_remove);
+EXPORT_SYMBOL_NS(hmc5843_common_remove, IIO_HMC5843);
 
 MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@ti.com>");
 MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 core driver");

drivers/iio/magnetometer/hmc5843_i2c.c

@@ -105,3 +105,4 @@ module_i2c_driver(hmc5843_driver);
 MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
 MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
 MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HMC5843);

drivers/iio/magnetometer/hmc5843_spi.c

@@ -102,3 +102,4 @@ module_spi_driver(hmc5843_driver);
 MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
 MODULE_DESCRIPTION("HMC5983 SPI driver");
 MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HMC5843);