blacklight: 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_driver_register() so we can drop the manual assignment.

The patch was generated using the following coccinelle semantic patch:
// <smpl>
@@
identifier _driver;
@@
struct spi_driver _driver = {
	.driver = {
-		.bus = &spi_bus_type,
	},
};
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c
index 7bdadc7..d2494c5 100644
--- a/drivers/video/backlight/ams369fg06.c
+++ b/drivers/video/backlight/ams369fg06.c
@@ -619,7 +619,6 @@
 static struct spi_driver ams369fg06_driver = {
 	.driver = {
 		.name	= "ams369fg06",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ams369fg06_probe,
diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c
index efd352b..2ea06a5f 100644
--- a/drivers/video/backlight/ld9040.c
+++ b/drivers/video/backlight/ld9040.c
@@ -846,7 +846,6 @@
 static struct spi_driver ld9040_driver = {
 	.driver = {
 		.name	= "ld9040",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ld9040_probe,
diff --git a/drivers/video/backlight/ltv350qv.c b/drivers/video/backlight/ltv350qv.c
index 333949f..d23922f 100644
--- a/drivers/video/backlight/ltv350qv.c
+++ b/drivers/video/backlight/ltv350qv.c
@@ -310,7 +310,6 @@
 static struct spi_driver ltv350qv_driver = {
 	.driver = {
 		.name		= "ltv350qv",
-		.bus		= &spi_bus_type,
 		.owner		= THIS_MODULE,
 	},
 
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
index e264f55..3ed05c7 100644
--- a/drivers/video/backlight/s6e63m0.c
+++ b/drivers/video/backlight/s6e63m0.c
@@ -899,7 +899,6 @@
 static struct spi_driver s6e63m0_driver = {
 	.driver = {
 		.name	= "s6e63m0",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= s6e63m0_probe,