net: dsa: mv88e6xxx: Add mv88e6390 watchdog interrupt support

Implement the ops needed to support the watchdog for the MV88E6390
family.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/global2.h

@@ -47,6 +47,7 @@ void mv88e6xxx_g2_irq_free(struct mv88e6xxx_chip *chip);
 int mv88e6095_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip);
 
 extern const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops;
+extern const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops;
 
 #else /* !CONFIG_NET_DSA_MV88E6XXX_GLOBAL2 */
 
@@ -128,6 +129,7 @@ static inline int mv88e6095_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip)
 }
 
 static const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = {};
+static const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = {};
 
 #endif /* CONFIG_NET_DSA_MV88E6XXX_GLOBAL2 */