powerpc: Convert to new irq_* function names

Scripted with coccinelle.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/powerpc/sysdev/tsi108_pci.c b/arch/powerpc/sysdev/tsi108_pci.c
index 088413a..4d18658 100644
--- a/arch/powerpc/sysdev/tsi108_pci.c
+++ b/arch/powerpc/sysdev/tsi108_pci.c
@@ -392,7 +392,7 @@
 	if ((virq >= 1) && (virq <= 4)){
 		irq = virq + IRQ_PCI_INTAD_BASE - 1;
 		irq_set_status_flags(irq, IRQ_LEVEL);
-		set_irq_chip(irq, &tsi108_pci_irq);
+		irq_set_chip(irq, &tsi108_pci_irq);
 	}
 	return 0;
 }
@@ -431,7 +431,7 @@
 
 void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc)
 {
-	struct irq_chip *chip = get_irq_desc_chip(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
 	unsigned int cascade_irq = get_pci_source();
 
 	if (cascade_irq != NO_IRQ)