ethernet: smsc: remove unnecessary (void*) conversions

No need cast (voidd*) to (struct smsc911x_data *) or
(struct smsc9420_pdata *).
Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Link: https://lore.kernel.org/r/20230717031204.54912-1-yunchuan@nfschina.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/smsc/smsc911x.c

@@ -552,7 +552,7 @@ static void smsc911x_mac_write(struct smsc911x_data *pdata,
 /* Get a phy register */
 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
 {
-	struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
+	struct smsc911x_data *pdata = bus->priv;
 	unsigned long flags;
 	unsigned int addr;
 	int i, reg;
@@ -591,7 +591,7 @@ static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
 			   u16 val)
 {
-	struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
+	struct smsc911x_data *pdata = bus->priv;
 	unsigned long flags;
 	unsigned int addr;
 	int i, reg;

drivers/net/ethernet/smsc/smsc9420.c

@@ -102,7 +102,7 @@ static inline void smsc9420_pci_flush_write(struct smsc9420_pdata *pd)
 
 static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
 {
-	struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv;
+	struct smsc9420_pdata *pd = bus->priv;
 	unsigned long flags;
 	u32 addr;
 	int i, reg = -EIO;
@@ -140,7 +140,7 @@ static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
 static int smsc9420_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
 			   u16 val)
 {
-	struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv;
+	struct smsc9420_pdata *pd = bus->priv;
 	unsigned long flags;
 	u32 addr;
 	int i, reg = -EIO;