[POWERPC] mpic: set IPIs to be per-CPU

This patch changes the MPIC IPIs to be per-CPU to avoid getting a
warning ("Cannot set affinity for irq 251") when taking a CPU
offline via sysfs or during suspend.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/sysdev/mpic.c

@@ -1370,7 +1370,7 @@ void mpic_request_ipis(void)
 			printk(KERN_ERR "Failed to map IPI %d\n", i);
 			break;
 		}
-		request_irq(vipi, mpic_ipi_action, IRQF_DISABLED,
+		request_irq(vipi, mpic_ipi_action, IRQF_DISABLED|IRQF_PERCPU,
 			    ipi_names[i], mpic);
 	}
 }