net: phy: check for implementation of both callbacks in phy_drv_supports_irq

Now that the icplus driver has been fixed all PHY drivers supporting
interrupts have both callbacks (config_intr and ack_interrupt)
implemented - as it should be. Therefore phy_drv_supports_irq()
can be changed now to check for both callbacks being implemented.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy_device.c

@@ -2122,7 +2122,7 @@ static void of_set_phy_eee_broken(struct phy_device *phydev)
 
 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
 {
-	return phydrv->config_intr || phydrv->ack_interrupt;
+	return phydrv->config_intr && phydrv->ack_interrupt;
 }
 
 /**