net: hisilicon: fix hsn3_ethtool kernel-doc warnings

Fix kernel-doc warnings and spacing in hns3_ethtool.c:

hns3_ethtool.c:246: warning: No description found for return value of 'hns3_lp_run_test'
hns3_ethtool.c:408: warning: expecting prototype for hns3_nic_self_test(). Prototype was for hns3_self_test() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Peng Li <lipeng321@huawei.com>
Cc: Guangbin Huang <huangguangbin2@huawei.com>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

@@ -238,9 +238,11 @@ static void hns3_lb_clear_tx_ring(struct hns3_nic_priv *priv, u32 start_ringid,
 }
 
 /**
- * hns3_lp_run_test -  run loopback test
+ * hns3_lp_run_test - run loopback test
  * @ndev: net device
  * @mode: loopback type
+ *
+ * Return: %0 for success or a NIC loopback test error code on failure
  */
 static int hns3_lp_run_test(struct net_device *ndev, enum hnae3_loop mode)
 {
@@ -398,7 +400,7 @@ static void hns3_do_selftest(struct net_device *ndev, int (*st_param)[2],
 }
 
 /**
- * hns3_nic_self_test - self test
+ * hns3_self_test - self test
  * @ndev: net device
  * @eth_test: test cmd
  * @data: test result