staging:iio: Convert remaining drivers to module_spi_driver

Convert the IIO drivers which have not been converted yet to module_spi_driver.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/dac/ad5421.c

@@ -536,18 +536,7 @@ static struct spi_driver ad5421_driver = {
 	.probe = ad5421_probe,
 	.remove = __devexit_p(ad5421_remove),
 };
-
-static __init int ad5421_init(void)
-{
-	return spi_register_driver(&ad5421_driver);
-}
-module_init(ad5421_init);
-
-static __exit void ad5421_exit(void)
-{
-	spi_unregister_driver(&ad5421_driver);
-}
-module_exit(ad5421_exit);
+module_spi_driver(ad5421_driver);
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("Analog Devices AD5421 DAC");

drivers/staging/iio/dac/ad5764.c

@@ -375,18 +375,7 @@ static struct spi_driver ad5764_driver = {
 	.remove = __devexit_p(ad5764_remove),
 	.id_table = ad5764_ids,
 };
-
-static int __init ad5764_spi_init(void)
-{
-	return spi_register_driver(&ad5764_driver);
-}
-module_init(ad5764_spi_init);
-
-static void __exit ad5764_spi_exit(void)
-{
-	spi_unregister_driver(&ad5764_driver);
-}
-module_exit(ad5764_spi_exit);
+module_spi_driver(ad5764_driver);
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC");