net: dsa: mv88e6xxx: Return error from irq_find_mapping()

Fix a cut/paste error. When irq_find_mapping() returns an error for
the ATU or VTU interrupt, return that error, not the value of
chip->device_irq.

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

drivers/net/dsa/mv88e6xxx/global1_atu.c

@@ -377,7 +377,7 @@ int mv88e6xxx_g1_atu_prob_irq_setup(struct mv88e6xxx_chip *chip)
 	chip->atu_prob_irq = irq_find_mapping(chip->g1_irq.domain,
 					      MV88E6XXX_G1_STS_IRQ_ATU_PROB);
 	if (chip->atu_prob_irq < 0)
-		return chip->device_irq;
+		return chip->atu_prob_irq;
 
 	err = request_threaded_irq(chip->atu_prob_irq, NULL,
 				   mv88e6xxx_g1_atu_prob_irq_thread_fn,

drivers/net/dsa/mv88e6xxx/global1_vtu.c

@@ -570,7 +570,7 @@ int mv88e6xxx_g1_vtu_prob_irq_setup(struct mv88e6xxx_chip *chip)
 	chip->vtu_prob_irq = irq_find_mapping(chip->g1_irq.domain,
 					      MV88E6XXX_G1_STS_IRQ_VTU_PROB);
 	if (chip->vtu_prob_irq < 0)
-		return chip->device_irq;
+		return chip->vtu_prob_irq;
 
 	err = request_threaded_irq(chip->vtu_prob_irq, NULL,
 				   mv88e6xxx_g1_vtu_prob_irq_thread_fn,