net: mdio: Remove unnecessary (void*) conversions

No need cast (void*) to (struct xgene_mdio_pdata *).
Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230717031212.54991-1-yunchuan@nfschina.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/mdio/mdio-xgene.c

@@ -79,7 +79,7 @@ EXPORT_SYMBOL(xgene_mdio_wr_mac);
 
 int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg)
 {
-	struct xgene_mdio_pdata *pdata = (struct xgene_mdio_pdata *)bus->priv;
+	struct xgene_mdio_pdata *pdata = bus->priv;
 	u32 data, done;
 	u8 wait = 10;
 
@@ -105,7 +105,7 @@ EXPORT_SYMBOL(xgene_mdio_rgmii_read);
 
 int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id, int reg, u16 data)
 {
-	struct xgene_mdio_pdata *pdata = (struct xgene_mdio_pdata *)bus->priv;
+	struct xgene_mdio_pdata *pdata = bus->priv;
 	u32 val, done;
 	u8 wait = 10;