[PATCH] spi: remove return in spi_unregister_driver()

Make the spi_unregister_driver() code fit in with the rest of the header
file, and only do the action if the driver passed is non-NULL.

This also makes the code a line smaller.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/linux/spi/spi.h

@@ -148,13 +148,11 @@ extern int spi_register_driver(struct spi_driver *sdrv);
 
 static inline void spi_unregister_driver(struct spi_driver *sdrv)
 {
-	if (!sdrv)
-		return;
-	driver_unregister(&sdrv->driver);
+	if (sdrv)
+		driver_unregister(&sdrv->driver);
 }
 
 
-
 /**
  * struct spi_master - interface to SPI master controller
  * @cdev: class interface to this driver