net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt

Flag PHY_HAS_INTERRUPT is used only here for this small check. I think
using interrupts isn't possible if a driver defines neither
config_intr nor ack_interrupts callback. So we can replace checking
flag PHY_HAS_INTERRUPT with checking for these callbacks.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy_device.c

@@ -2074,6 +2074,11 @@ static void of_set_phy_eee_broken(struct phy_device *phydev)
 	phydev->eee_broken_modes = broken;
 }
 
+static bool phy_drv_supports_irq(struct phy_driver *phydrv)
+{
+	return phydrv->config_intr || phydrv->ack_interrupt;
+}
+
 /**
  * phy_probe - probe and init a PHY device
  * @dev: device to probe and init
@@ -2095,8 +2100,7 @@ static int phy_probe(struct device *dev)
 	/* Disable the interrupt if the PHY doesn't support it
 	 * but the interrupt is still a valid one
 	 */
-	if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
-	    phy_interrupt_is_valid(phydev))
+	 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
 		phydev->irq = PHY_POLL;
 
 	if (phydrv->flags & PHY_IS_INTERNAL)