NTB: ntb_transport: fix all kernel-doc warnings

Fix all kernel-doc warnings in ntb_transport.c.

The function parameters for ntb_transport_create_queue() changed, so
update them in the kernel-doc comments.
Add a Returns: comment for ntb_transport_register_client_dev().

ntb_transport.c:382: warning: No description found for return value of 'ntb_transport_register_client_dev'
ntb_transport.c:1984: warning: Excess function parameter 'rx_handler' description in 'ntb_transport_create_queue'
ntb_transport.c:1984: warning: Excess function parameter 'tx_handler' description in 'ntb_transport_create_queue'
ntb_transport.c:1984: warning: Excess function parameter 'event_handler' description in 'ntb_transport_create_queue'

Signed-off-by: Randy Dunlap <[email protected]>
Cc: Jon Mason <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: Allen Hubbe <[email protected]>
Cc: [email protected]
Reviewed-by: Dave Jiang <[email protected]>
Signed-off-by: Jon Mason <[email protected]>

Author: rddunlap

drivers/ntb/ntb_transport.c

@@ -377,6 +377,8 @@ EXPORT_SYMBOL_GPL(ntb_transport_unregister_client_dev);
  * @device_name: Name of NTB client device
  *
  * Register an NTB client device with the NTB transport layer
+ *
+ * Returns: %0 on success or -errno code on error
  */
 int ntb_transport_register_client_dev(char *device_name)
 {
@@ -1966,9 +1968,9 @@ static bool ntb_dma_filter_fn(struct dma_chan *chan, void *node)
 
 /**
  * ntb_transport_create_queue - Create a new NTB transport layer queue
- * @rx_handler: receive callback function
- * @tx_handler: transmit callback function
- * @event_handler: event callback function
+ * @data: pointer for callback data
+ * @client_dev: &struct device pointer
+ * @handlers: pointer to various ntb queue (callback) handlers
  *
  * Create a new NTB transport layer queue and provide the queue with a callback
  * routine for both transmit and receive.  The receive callback routine will be