m68knommu: fix mis-named variable int set_irq_chip loop

Compiling for 68360 targets gives:

  CC      arch/m68knommu/platform/68360/ints.o
arch/m68knommu/platform/68360/ints.c: In function ‘init_IRQ’:
arch/m68knommu/platform/68360/ints.c:135:16: error: ‘irq’ undeclared (first use in this function)
arch/m68knommu/platform/68360/ints.c:135:16: note: each undeclared identifier is reported only once for each function it appears in

Fix variable name used.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68knommu/platform/68360/ints.c

@@ -132,8 +132,8 @@ void init_IRQ(void)
 	pquicc->intr_cimr = 0x00000000;
 
 	for (i = 0; (i < NR_IRQS); i++) {
-		set_irq_chip(irq, &intc_irq_chip);
-		set_irq_handler(irq, handle_level_irq);
+		set_irq_chip(i, &intc_irq_chip);
+		set_irq_handler(i, handle_level_irq);
 	}
 }