powerpc/irq: Stop exporting irq_map

First step in eliminating irq_map[] table entirely

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/xics/icp-hv.c b/arch/powerpc/sysdev/xics/icp-hv.c
index b03d348..76e8724 100644
--- a/arch/powerpc/sysdev/xics/icp-hv.c
+++ b/arch/powerpc/sysdev/xics/icp-hv.c
@@ -58,7 +58,7 @@
 
 static void icp_hv_eoi(struct irq_data *d)
 {
-	unsigned int hw_irq = (unsigned int)irq_data_to_hw(d);
+	unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
 
 	iosync();
 	icp_hv_set_xirr((xics_pop_cppr() << 24) | hw_irq);