Fixed compiling warning.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2349 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/drivers/include/drivers/usb_device.h

@@ -47,7 +47,6 @@ struct udcd
 };
 typedef struct udcd* udcd_t;
 
-ALIGN(4)
 struct uendpoint
 {
     rt_list_t list;