[NET]: Eliminate MOD_* from wanrouter.

Wan router register/unregister does not need MOD_INC/MOD_DEC because it
can not be unloaded as long as its symbols are in use by the calling module.

net/wanrouter/wanmain.c

@@ -305,7 +305,6 @@ int register_wan_device(struct wan_device *wandev)
 	wandev->dev  = NULL;
 	wandev->next = wanrouter_router_devlist;
 	wanrouter_router_devlist = wandev;
-        MOD_INC_USE_COUNT;	/* prevent module from unloading */
 	return 0;
 }
 
@@ -350,7 +349,6 @@ int unregister_wan_device(char *name)
 		wanrouter_router_devlist = wandev->next;
 
 	wanrouter_proc_delete(wandev);
-        MOD_DEC_USE_COUNT;
 	return 0;
 }