wan/fsl_ucc_hdlc: use module_platform_driver to simplify the code

module_platform_driver() makes the code simpler by eliminating
boilerplate code.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index 10ca497..2fc50ec 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -1174,15 +1174,4 @@
 	},
 };
 
-static int __init ucc_hdlc_init(void)
-{
-	return platform_driver_register(&ucc_hdlc_driver);
-}
-
-static void __exit ucc_hdlc_exit(void)
-{
-	platform_driver_unregister(&ucc_hdlc_driver);
-}
-
-module_init(ucc_hdlc_init);
-module_exit(ucc_hdlc_exit);
+module_platform_driver(ucc_hdlc_driver);