crypto: convert drivers/crypto/* to use module_platform_driver()

This patch converts the drivers in drivers/crypto/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: James Hsiao <jhsiao@amcc.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 8115417..3376bca 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -683,18 +683,7 @@
 	},
 };
 
-static int __init s5p_aes_mod_init(void)
-{
-	return  platform_driver_register(&s5p_aes_crypto);
-}
-
-static void __exit s5p_aes_mod_exit(void)
-{
-	platform_driver_unregister(&s5p_aes_crypto);
-}
-
-module_init(s5p_aes_mod_init);
-module_exit(s5p_aes_mod_exit);
+module_platform_driver(s5p_aes_crypto);
 
 MODULE_DESCRIPTION("S5PV210 AES hw acceleration support.");
 MODULE_LICENSE("GPL v2");