[POWERPC] Make iSeries build without CONFIG_PCI

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/iseries/irq.c b/arch/powerpc/platforms/iseries/irq.c
index 5225abf..9f9972b 100644
--- a/arch/powerpc/platforms/iseries/irq.c
+++ b/arch/powerpc/platforms/iseries/irq.c
@@ -337,6 +337,8 @@
 	return irq;
 }
 
+#ifdef CONFIG_PCI
+
 static int iseries_irq_host_map(struct irq_host *h, unsigned int virq,
 				irq_hw_number_t hw)
 {
@@ -384,3 +386,4 @@
 				"failed with rc 0x%x\n", ret);
 }
 
+#endif	/* CONFIG_PCI */