ARM: u300 use module_spi_driver to register driver

Removing some boilerplate by using module_spi_driver instead of calling
register and unregister in the otherwise empty init/exit functions.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-u300/dummyspichip.c

@@ -278,19 +278,7 @@ static struct spi_driver pl022_dummy_driver = {
 	.remove	= pl022_dummy_remove,
 };
 
-static int __init pl022_init_dummy(void)
-{
-	return spi_register_driver(&pl022_dummy_driver);
-}
-
-static void __exit pl022_exit_dummy(void)
-{
-	spi_unregister_driver(&pl022_dummy_driver);
-}
-
-module_init(pl022_init_dummy);
-module_exit(pl022_exit_dummy);
-
+module_spi_driver(pl022_dummy_driver);
 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
 MODULE_DESCRIPTION("PL022 SSP/SPI DUMMY Linux driver");
 MODULE_LICENSE("GPL");