net: hns3: fix a typo in struct hclge_mac

The member link of struct hclge_mac stores the link status of
MAC and PHY if PHY exists, but its annotation uses word "exit",
so fix it.
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h

@@ -266,7 +266,7 @@ struct hclge_mac {
 	u32 fec_mode; /* active fec mode */
 	u32 user_fec_mode;
 	u32 fec_ability;
-	int link;	/* store the link status of mac & phy (if phy exit) */
+	int link;	/* store the link status of mac & phy (if phy exists) */
 	struct phy_device *phydev;
 	struct mii_bus *mdio_bus;
 	phy_interface_t phy_if;