[PATCH] spi: documentation does not need to set driver's bus_type field

The spi_register_driver() sets the bus_type field of the spi_driver being
registered, so there is no need to have it set in the driver itself.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/spi/spi-summary

@@ -284,7 +284,6 @@ SPI protocol drivers somewhat resemble platform device drivers:
 	static struct spi_driver CHIP_driver = {
 		.driver = {
 			.name		= "CHIP",
-			.bus		= &spi_bus_type,
 			.owner		= THIS_MODULE,
 		},