[CONNECTOR]: Cleanup struct cn_callback_entry

- 'cb' is a fake struct member. In a previous patch struct cn_callback
was renamed to cn_callback_id, so 'cb' should have been deleted at that
time.

- 'nls' isn't used and is redundant, we can retrieve this data through
cn_callback_entry.pdev->nls.

- 'seq' and 'group' should be u32, as they are declared to be u32 in
other places.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/connector/cn_queue.c

@@ -104,7 +104,6 @@ int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id
 		return -EINVAL;
 	}
 
-	cbq->nls = dev->nls;
 	cbq->seq = 0;
 	cbq->group = cbq->id.id.idx;
 

include/linux/connector.h

@@ -132,15 +132,13 @@ struct cn_callback_data {
 
 struct cn_callback_entry {
 	struct list_head callback_entry;
-	struct cn_callback *cb;
 	struct work_struct work;
 	struct cn_queue_dev *pdev;
 
 	struct cn_callback_id id;
 	struct cn_callback_data data;
 
-	int seq, group;
-	struct sock *nls;
+	u32 seq, group;
 };
 
 struct cn_ctl_entry {