MIPS: Malta SMTC: Fix build.

Commit a561b02a2577aec51277ba39c82bd192a79c0267 (lmo) rsp.
7c8d948f16 (kernel.org) ["MIPS: i8259: Convert
to new irq_chip functions"] missed one location to modify resulting in
build breakage.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mti-malta/malta-smtc.c

@@ -152,7 +152,7 @@ int plat_set_irq_affinity(struct irq_data *d, const struct cpumask *affinity,
 		 * runtime code can anyway deal with the null set
 		 */
 		printk(KERN_WARNING
-			"IRQ affinity leaves no legal CPU for IRQ %d\n", irq);
+		       "IRQ affinity leaves no legal CPU for IRQ %d\n", d->irq);
 
 	/* Do any generic SMTC IRQ affinity setup */
 	smtc_set_irq_affinity(d->irq, tmask);