drivercore: Add helper macro for platform_driver boilerplate

For simple modules that contain a single platform_driver without any
additional setup code then ends up being a block of duplicated
boilerplate.  This patch adds a new macro, module_platform_driver(),
which replaces the module_init()/module_exit() registrations with
template functions.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Reviewed-by: Magnus Damm <magnus.damm@gmail.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/spi/spi-bfin-sport.c b/drivers/spi/spi-bfin-sport.c
index e557ff6..248a2cc 100644
--- a/drivers/spi/spi-bfin-sport.c
+++ b/drivers/spi/spi-bfin-sport.c
@@ -938,15 +938,4 @@
 	.suspend = bfin_sport_spi_suspend,
 	.resume  = bfin_sport_spi_resume,
 };
-
-static int __init bfin_sport_spi_init(void)
-{
-	return platform_driver_register(&bfin_sport_spi_driver);
-}
-module_init(bfin_sport_spi_init);
-
-static void __exit bfin_sport_spi_exit(void)
-{
-	platform_driver_unregister(&bfin_sport_spi_driver);
-}
-module_exit(bfin_sport_spi_exit);
+module_platform_driver(bfin_sport_spi_driver);