mtd: doc: use module_platform_driver_probe()

This patch uses module_platform_driver_probe() macro which makes
the code smaller and simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/docg4.c b/drivers/mtd/nand/docg4.c
index 18fa448..fa25e7a 100644
--- a/drivers/mtd/nand/docg4.c
+++ b/drivers/mtd/nand/docg4.c
@@ -1397,18 +1397,7 @@
 	.remove		= __exit_p(cleanup_docg4),
 };
 
-static int __init docg4_init(void)
-{
-	return platform_driver_probe(&docg4_driver, probe_docg4);
-}
-
-static void __exit docg4_exit(void)
-{
-	platform_driver_unregister(&docg4_driver);
-}
-
-module_init(docg4_init);
-module_exit(docg4_exit);
+module_platform_driver_probe(docg4_driver, probe_docg4);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Mike Dunn");