adding user-visible register spec section to new arch spec 
adding user-visible register spec section to new arch spec 


hoangt/goblin-core,tangyibin/goblin-core,tangyibin/goblin-core,tangyibin/goblin-core,tangyibin/goblin-core,hoangt/goblin-core,tangyibin/goblin-core,hoangt/goblin-core,hoangt/goblin-core,tangyibin/goblin-core,hoangt/goblin-core,hoangt/goblin-core,tangyibin/goblin-core,hoangt/goblin-core,hoangt/goblin-core,hoangt/goblin-core,hoangt/goblin-core,tangyibin/goblin-core,tangyibin/goblin-core,tangyibin/goblin-core,hoangt/goblin-core,tangyibin/goblin-core