net: phy: dp83867: Remove unnecessary (void*) conversions

Pointer variables of void * type do not require type cast.

Signed-off-by: wuych <yunchuan@nfschina.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230424101550.664319-1-yunchuan@nfschina.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/dp83867.c

@@ -468,8 +468,7 @@ static int dp83867_set_tunable(struct phy_device *phydev,
 
 static int dp83867_config_port_mirroring(struct phy_device *phydev)
 {
-	struct dp83867_private *dp83867 =
-		(struct dp83867_private *)phydev->priv;
+	struct dp83867_private *dp83867 = phydev->priv;
 
 	if (dp83867->port_mirroring == DP83867_PORT_MIRROING_EN)
 		phy_set_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4,