static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
			      phy_interface_t interface,
			      struct phy_device *phydev)
static void mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
			       phy_interface_t interface,
			       struct phy_device *phydev)