net: hns: Remove unnecessary (void*) conversions

No need cast (void*) to (struct hns_mdio_device *).
Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Reviewed-by: Hao Lan <lanhao@huawei.com>
Link: https://lore.kernel.org/r/20230717031137.54639-1-yunchuan@nfschina.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/hisilicon/hns_mdio.c

@@ -217,7 +217,7 @@ static void hns_mdio_cmd_write(struct hns_mdio_device *mdio_dev,
 static int hns_mdio_write_c22(struct mii_bus *bus,
 			      int phy_id, int regnum, u16 data)
 {
-	struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+	struct hns_mdio_device *mdio_dev = bus->priv;
 	u16 reg = (u16)(regnum & 0xffff);
 	u16 cmd_reg_cfg;
 	int ret;
@@ -259,7 +259,7 @@ static int hns_mdio_write_c22(struct mii_bus *bus,
 static int hns_mdio_write_c45(struct mii_bus *bus, int phy_id, int devad,
 			      int regnum, u16 data)
 {
-	struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+	struct hns_mdio_device *mdio_dev = bus->priv;
 	u16 reg = (u16)(regnum & 0xffff);
 	u16 cmd_reg_cfg;
 	int ret;
@@ -312,7 +312,7 @@ static int hns_mdio_write_c45(struct mii_bus *bus, int phy_id, int devad,
  */
 static int hns_mdio_read_c22(struct mii_bus *bus, int phy_id, int regnum)
 {
-	struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+	struct hns_mdio_device *mdio_dev = bus->priv;
 	u16 reg = (u16)(regnum & 0xffff);
 	u16 reg_val;
 	int ret;
@@ -363,7 +363,7 @@ static int hns_mdio_read_c22(struct mii_bus *bus, int phy_id, int regnum)
 static int hns_mdio_read_c45(struct mii_bus *bus, int phy_id, int devad,
 			     int regnum)
 {
-	struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+	struct hns_mdio_device *mdio_dev = bus->priv;
 	u16 reg = (u16)(regnum & 0xffff);
 	u16 reg_val;
 	int ret;
@@ -424,7 +424,7 @@ static int hns_mdio_read_c45(struct mii_bus *bus, int phy_id, int devad,
  */
 static int hns_mdio_reset(struct mii_bus *bus)
 {
-	struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+	struct hns_mdio_device *mdio_dev = bus->priv;
 	const struct hns_mdio_sc_reg *sc_reg;
 	int ret;