iio: dac: ad5064: fix section mismatch in ad5064_init() in linux-next

ad5064_init() calls ad5064_spi_unregister_driver() which is annotated
__exit.

Signed-off-by: Gerard Snitselaar <dev@snitselaar.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/dac/ad5064.c

@@ -572,7 +572,7 @@ static int __init ad5064_spi_register_driver(void)
 	return spi_register_driver(&ad5064_spi_driver);
 }
 
-static void __exit ad5064_spi_unregister_driver(void)
+static void ad5064_spi_unregister_driver(void)
 {
 	spi_unregister_driver(&ad5064_spi_driver);
 }