net: mdio: Correct function name mdio45_links_ok() in comment

Fix the following make W=1 kernel build warning:

 drivers/net/mdio.c:95: warning: expecting prototype for mdio_link_ok(). Prototype was for mdio45_links_ok() instead
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mdio.c

@@ -83,7 +83,7 @@ int mdio_set_flag(const struct mdio_if_info *mdio,
 EXPORT_SYMBOL(mdio_set_flag);
 
 /**
- * mdio_link_ok - is link status up/OK
+ * mdio45_links_ok - is link status up/OK
  * @mdio: MDIO interface
  * @mmd_mask: Mask for MMDs to check
  *