ASoC: wm0010: Remove redundant spi driver bus initialization

In ancient times it was necessary to manually initialize the bus
field of an spi_driver to spi_bus_type. These days this is done in
spi_register_driver(), so we can drop the manual assignment.
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm0010.c

@@ -1003,7 +1003,6 @@ static int wm0010_spi_remove(struct spi_device *spi)
 static struct spi_driver wm0010_spi_driver = {
 	.driver = {
 		.name	= "wm0010",
-		.bus 	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= wm0010_spi_probe,